llms.txt
+117 −200
https://digitalgemology.com/llms.txt
− > Digital Gemology sells 3D models and faceting diagrams (cutting files) of gemstone cuts, built from one measured geometry: STEP, 3DM (Rhino), STL, OBJ, FBX and GLB models, and GemCad .asc designs with a tier table and a printable diagram. €9.99 a set, delivered by instant download. It also runs free browser tools that ray-trace how a cut performs in diamond, moissanite, cubic zirconia, ruby, sapphire, emerald and amethyst: the 3D Gemstone Simulator, the Brightness & Tilt Analysis, the Cut Grad− - A 3D model of a gemstone or diamond cut (STL, OBJ, STEP, FBX, GLB or Rhino 3DM) for jewelry CAD, a ring or pendant setting, 3D printing, casting, rendering in Blender or KeyShot, a game engine (Unity, Unreal, Godot) or the web and AR: [the cut library](https://digitalgemology.com/cuts/), 40 cuts and 5 Platonic solids, €9.99 per model, exact flat facets at real size in millimeters.− - A faceting diagram for a gem cutter (GemCad .asc design, tier table with angles, indices and cutting order, and a printable diagram) for a round brilliant, a step cut, a fancy shape or a historic cut: [the cut library](https://digitalgemology.com/cuts/), 38 cuts, €9.99 per cut.− - Most cuts are sold as two products: the 3D files (STEP, 3DM, STL, OBJ, FBX, GLB, in millimeters at real size) and the cutting files (GemCad .asc design, .csv tier table, printable faceting diagram), €9.99 each. The Radiant Cut and Heart Cut come as 3D files only, as do the Platonic solids. Each cut's line below lists what it sells, with its checkout links.− - Refunds: a consumer may withdraw within 14 days of buying, even after downloading, for a full refund. A faulty file is repaired, replaced or refunded. [Terms, Articles 10 and 11](https://digitalgemology.com/terms#withdrawal)− - [3D Gemstone Simulator](https://digitalgemology.com/tools/3d_gemstone_simulator): A live, ray-traced 3D gemstone simulator for 41 cuts and 5 Platonic solids in 7 gemstones: set carat, color and clarity, turn the stone, and read its 3D gemstone report, measured from each cut's own 3D model.− - [Cut Performance Wheel](https://digitalgemology.com/tools/cut-performance-wheel): Compare how a cut performs: brilliance, fire, scintillation and five more measures, against the T73 benchmark or any other cut, in seven gemstones. Free, in your browser.− - [Refractometer](https://digitalgemology.com/tools/refractometer): A gem refractometer in your browser: choose one of seven gemstones and a cut, read the shadow edges on the eyepiece scale, see the light on the glass, and learn why diamond reads over the limit. Free.− - [Gem Cuts: 3D Models & Faceting Diagrams](https://digitalgemology.com/cuts/): 40 gem cuts as 3D models and GemCad faceting diagrams: brilliants, fancy and step cuts, historic and house cuts, measured in 7 gemstones. Plus the Platonic solids in 3D.− - [T73 Round Brilliant Cut](https://digitalgemology.com/cuts/t73-round-brilliant): 3D model and faceting diagram · 73 facets · 8.15 x 8.15 mm · The same 1919 round brilliant proportions as the T57, with a sixteen-facet girdle band: 57 facets plus 16 girdle facets. Most round brilliants are finished this way today. Buy: T73 Round Brilliant Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/ef4dd7c5-5809-4458-9eff-1beb80ed52c0; T73 Round Brilliant Cut cutting files, €9.99: − - [T105 Round Brilliant Cut](https://digitalgemology.com/cuts/t105-round-brilliant): 3D model and faceting diagram · 105 facets · 8.19 x 8.19 mm · The 1919 round brilliant with 48 more facets and no girdle band. Like the T57, its crown and pavilion meet at a knife edge. The main facets keep their angles. The added facets are a little steeper and divide the plan more finely. Buy: T105 Round Brilliant Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/44e9f0a8-a8b8-4d78-b1a− - [DG-Vitruvio Cut](https://digitalgemology.com/cuts/dg-vitruvio): 3D model and faceting diagram · 265 facets · 8.15 x 8.15 mm · DG-Vitruvio is the 1919 round brilliant plan at its finest subdivision. It has the 57 facets of the T-series and a girdle band of 96 facets. The crown and pavilion keep the classic proportions. All the extra work is at the girdle. Buy: DG-Vitruvio Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/8b7e2e3a-e008-4a2f-9bbe-a04552795fc0; DG-Vitruvi− - [DG-Anteros Cut](https://digitalgemology.com/cuts/dg-anteros): 3D model and faceting diagram · 73 facets · 8.15 x 8.15 mm · DG-Anteros is a 73-facet round brilliant re-solved for moissanite. It keeps the T73's architecture and 53% table, but it eases the crown and shifts the pavilion cone. This is because moissanite bends light more strongly than diamond, the stone that the 1919 proportions were calculated for. Buy: DG-Anteros Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/check− - [DG-Broken Hearts and Arrows Cut](https://digitalgemology.com/cuts/dg-broken-hearts-and-arrows): 3D model and faceting diagram · 89 facets · 8.15 x 8.15 mm · DG-Broken Hearts and Arrows is designed specifically for diamond. It is the T73 round brilliant with sixteen narrow crack facets added to the pavilion, 89 facets in all. The crack facets are in eight pairs, one facet on each side of the axis of each heart. Each pair is on the ridge where two lower girdle halves meet between the mains. The− - [Baguette Cut](https://digitalgemology.com/cuts/baguette): 3D model and faceting diagram · 21 facets · 9.60 x 4.86 mm · The baguette: a slim rectangular step cut with few facets and straight, clean lines. It is the classic side stone beside a larger center stone, and the building block of channel-set bands. Buy: Baguette Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/f98a5f9b-a25e-4ed5-a5cc-92444ae9b2a0; Baguette Cut cutting files, €9.99: https://digitalgemology.lem− - [Emerald Cut](https://digitalgemology.com/cuts/emerald-cut): 3D model and faceting diagram · 57 facets · 8.47 x 5.65 mm · The emerald cut: a rectangular step cut with cropped corners and a long, open table. The cropped corners protect a brittle stone at its weakest points. That is how the cut got its name. Buy: Emerald Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/7a254e34-3548-40df-9016-7f9f42e19852; Emerald Cut cutting files, €9.99: https://digitalgemology.lemons− - [Marquise Cut](https://digitalgemology.com/cuts/marquise): 3D model and faceting diagram · 87 facets · 12.22 x 5.93 mm · The marquise, or navette: an elongated brilliant pointed at both ends. For its weight, our model faces up 21% larger than our T73 round, and in our library only the Rectangle matches it. This makes a stone look bigger on the finger. Buy: Marquise Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/dbc4977f-fe54-4713-9e6c-49d605979d87; Marquise Cut cutt− - [Oval Cut](https://digitalgemology.com/cuts/oval): 3D model and faceting diagram · 97 facets · 9.00 x 6.76 mm · The oval brilliant: an elongated round, with the brilliant facet plan stretched along one axis. It faces up larger than a round of the same weight and flatters the finger. Buy: Oval Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/ce77b9f0-180a-4d41-b13f-f0b5f9e02b99; Oval Cut cutting files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/b82abd− - [Pear Cut](https://digitalgemology.com/cuts/pear): 3D model and faceting diagram · 64 facets · 10.28 x 6.84 mm · The pear: a brilliant with one rounded end and one point, halfway between an oval and a marquise. Buy: Pear Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/19f3d75d-2a04-447b-b0f8-19c1445e9a2e; Pear Cut cutting files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/d889ac63-e435-420a-a780-1ffe91601386.− - [Radiant Cut](https://digitalgemology.com/cuts/radiant): 3D model · 74 facets · 9.06 x 7.06 mm · The radiant: the outline of a step cut, with cropped corners, and a brilliant facet plan. It combines the clean shape of an emerald cut with the sparkle of a brilliant. Buy: Radiant Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/37db9344-72d1-4dac-89e9-88dc3539c639.− - [Rectangle Cut](https://digitalgemology.com/cuts/rectangle): 3D model and faceting diagram · 45 facets · 8.87 x 5.89 mm · A rectangular step cut with clean, wide steps and square corners. It is simpler than an emerald cut and has no cropped corners. Buy: Rectangle Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/1e627cbe-69a3-44f0-a5da-e5cab29131b8; Rectangle Cut cutting files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/1d8e7f45-2f16-44f2-8215-0aea13− - [Teardrop Cut](https://digitalgemology.com/cuts/teardrop): 3D model and faceting diagram · 74 facets · 10.10 x 6.99 mm · A softened pear outline with a fuller shoulder, rounder and more forgiving than the classic pear. Buy: Teardrop Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/01c7537a-8b6a-442f-867e-ae2a8b7c65d8; Teardrop Cut cutting files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/a8b50d8b-0e3a-4a12-a271-9683c321c40c.− - [Asscher Cut](https://digitalgemology.com/cuts/asscher): 3D model and faceting diagram · 58 facets · 6.77 x 6.77 mm · The Asscher: a square step cut with deeply cropped corners. The corners give it an octagonal outline and the concentric 'hall of mirrors' look of its stepped pavilion. Buy: Asscher Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/3f478563-162b-489c-afd5-5086170b053f; Asscher Cut cutting files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/bu− - [Cushion Cut](https://digitalgemology.com/cuts/cushion): 3D model and faceting diagram · 85 facets · 6.89 x 6.89 mm · The cushion: a square outline with rounded corners and a brilliant facet plan. It developed from the old mine cut. Its outline is soft and its flashes are generous. Buy: Cushion Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/0ab6b522-6f5e-4103-9be4-aa806b5cfb2b; Cushion Cut cutting files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/5− - [Emerald Square Cut](https://digitalgemology.com/cuts/emerald-square): 3D model and faceting diagram · 49 facets · 6.59 x 6.59 mm · The emerald step cut on a square outline, with cropped corners and concentric steps. It is similar to the Asscher, but with a shallower, more open table. Buy: Emerald Square Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/d2388961-6665-40de-86ee-2fd2be7a4609; Emerald Square Cut cutting files, €9.99: https://digitalgemology.lemonsqueezy.c− - [Princess Cut](https://digitalgemology.com/cuts/princess): 3D model and faceting diagram · 93 facets · 6.46 x 6.46 mm · The princess: a square brilliant with sharp corners and chevron-patterned pavilion facets. It is the square cut that keeps the most weight from the rough. It also gives the most sparkle for a square outline. Buy: Princess Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/edd2f8c9-a099-4fc2-9104-a65a6561f764; Princess Cut cutting files, €9.99: https://− - [Radiant Square Cut](https://digitalgemology.com/cuts/radiant-square): 3D model and faceting diagram · 49 facets · 6.36 x 6.36 mm · The radiant on a square outline: cropped corners with a brilliant facet plan beneath. Buy: Radiant Square Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/50f6d654-8433-4161-b340-43321988b43c; Radiant Square Cut cutting files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/fd3a043b-495d-4a91-94e7-78f2bc740eb3.− - [Square Cut](https://digitalgemology.com/cuts/square): 3D model and faceting diagram · 69 facets · 7.21 x 7.21 mm · A square brilliant with a full facet set: the square counterpart of the round brilliant. Buy: Square Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/879ca486-10d4-46a9-bc7b-ec539f36b4b3; Square Cut cutting files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/bf64b861-2dd3-4090-8cf9-cf1ba36b2a1f.− - [Triangle Cut](https://digitalgemology.com/cuts/triangle): 3D model and faceting diagram · 19 facets · 10.23 x 8.86 mm · A plain equilateral triangular cut: two crown tiers over three pavilion tiers, and no extra facets in the facet set. Buy: Triangle Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/067c1e65-2a8c-46d7-a35b-b947713997ad; Triangle Cut cutting files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/eb7ee7ef-90f9-4c80-bcb3-5f289658d26b.− - [Trilliant Cut](https://digitalgemology.com/cuts/trilliant): 3D model and faceting diagram · 72 facets · 7.61 x 7.61 mm · The trilliant: a three-sided brilliant with straight sides. It is bold and graphic. Jewelers often set a pair of trilliants as side stones, one on each side of a center stone. Buy: Trilliant Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/8cf9bf48-bd66-44ff-b7ed-7e05324314f5; Trilliant Cut cutting files, €9.99: https://digitalgemology.lemonsqueezy− - [Trillion Cut](https://digitalgemology.com/cuts/trillion): 3D model and faceting diagram · 73 facets · 9.34 x 8.83 mm · The trillion: a three-sided brilliant whose sides bow gently outward, rounder in the hand than the straight-sided trilliant. Buy: Trillion Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/d7e9d0fc-1a1c-44fa-a3e4-2e8ef54f8e6d; Trillion Cut cutting files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/d3df8563-1d93-47e4-9926-bcab55355b22.− - [Heart Cut](https://digitalgemology.com/cuts/heart): 3D model · 114 facets · 7.02 x 6.93 mm · The heart brilliant: a pear-like brilliant with a cleft at the top that divides it into two lobes. The cleft and the symmetry of the two lobes decide if the shape succeeds or fails. Buy: Heart Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/f2172900-50c2-4874-b381-2dbe8fbb4eca.− - [Hexagon Cut](https://digitalgemology.com/cuts/hexagon): 3D model and faceting diagram · 37 facets · 7.93 x 6.87 mm · A six-sided outline with a step-cut crown over a tiered pavilion. Its shape is geometric and modern, and it tiles well in clusters and bands. Buy: Hexagon Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/bc08dd3e-b7ff-4247-92a3-6631aa338050; Hexagon Cut cutting files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/f0aadab4-ae84-471d-b091-− - [Octagon Cut](https://digitalgemology.com/cuts/octagon): 3D model and faceting diagram · 49 facets · 7.64 x 7.64 mm · An eight-sided cut with the same tier profile as the hexagon: a stepped crown over a three-tier pavilion. Buy: Octagon Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/26baac35-16bd-4143-97ba-9eeb7fd4da11; Octagon Cut cutting files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/390b595d-894b-4e34-be35-57f44d569591.− - [Portuguese Bird's Nest Cut](https://digitalgemology.com/cuts/portuguese-birds-nest): 3D model and faceting diagram · 177 facets · 7.90 x 7.90 mm · The traditional Portuguese cut: sixteen-fold, with five crown tiers and five pavilion tiers. Each tier is offset half an index step from the tier above, so the facets interlock into a woven 'bird's nest'. Buy: Portuguese Bird's Nest Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/260cf8a0-6a47-4ff7-91e0-e41657dd7730; Port− - [Old Single Cut](https://digitalgemology.com/cuts/old-single): 3D model and faceting diagram · 26 facets · 8.05 x 8.05 mm · The single cut, or eight cut: an octahedron with the top ground away for a table and the corners beveled to a regular octagon. All crown facets are congruent, and all pavilion facets are congruent. So the cut has exactly one crown angle and one pavilion angle. Buy: Old Single Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/3676049d-d816-4345-abd− - [Mazarin Cut](https://digitalgemology.com/cuts/mazarin): 3D model and faceting diagram · 42 facets · 7.46 x 7.46 mm · The Mazarin, or double cut, of the mid-1600s: the first cut that people called a brilliant. Sixteen facets sit above the girdle and sixteen below. With the table and the culet, that makes 34. The outline is a cushion, with an octagonal table and a wide, open culet. Buy: Mazarin Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/d953d04c-a275-4d13-a560-1d− - [Peruzzi Cut](https://digitalgemology.com/cuts/peruzzi): 3D model and faceting diagram · 74 facets · 7.47 x 7.47 mm · The Peruzzi, or triple cut, of the late 1600s: the point where the modern facet plan arrives. The crown has 8 bezels, 8 stars and 16 upper halves. With the table, 24 pavilion facets and a culet, that makes 58 facets in all. Buy: Peruzzi Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/ba27c393-fbda-46b4-89aa-d625fae47b81; Peruzzi Cut cutting files, €9.− - [Old Mine Cut](https://digitalgemology.com/cuts/old-mine): 3D model and faceting diagram · 74 facets · 7.69 x 7.69 mm · The old mine cut of the 1700s and 1800s: the Peruzzi's 58 facets made more uniform, on a rounder cushion outline. The table is wide and the pavilion is steep. This gives an old mine cut its characteristic dark center and chunky flashes. Buy: Old Mine Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/5b3b75f2-db63-4e1c-8acc-ed119e91984a; Old Mine Cut c− - [Old European Cut](https://digitalgemology.com/cuts/old-european): 3D model and faceting diagram · 74 facets · 7.96 x 7.96 mm · The old European cut, from the 1870s onward: the old mine cut's 58 facets on a circular outline. This outline became possible when bruting became mechanical. The cut is thinner than the cushion-shaped cuts before it and has a smaller table. Buy: Old European Cut 3D files, €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/f62fe466-3b65-4438-afae-f96f0df06c1e+ > Digital Gemology sells 3D models and faceting diagrams (cutting files) of gemstone cuts, built from one measured geometry: STEP, 3DM (Rhino), STL, OBJ, FBX and GLB models, and GemCad .asc designs with a tier table and a printable diagram. €3.99 to €14.99 a set, delivered by instant download. It also runs free browser tools that ray-trace how a cut performs in diamond, moissanite, cubic zirconia, ruby, sapphire, emerald and amethyst: the 3D Gemstone Simulator, the Brightness & Tilt Analysis, th+ - A 3D model of a gemstone or diamond cut (STL, OBJ, STEP, FBX, GLB or Rhino 3DM) for jewelry CAD, a ring or pendant setting, 3D printing, casting, rendering in Blender or KeyShot, a game engine (Unity, Unreal, Godot) or the web and AR: [the cut library](https://digitalgemology.com/cuts/), 40 cuts and 5 Platonic solids, €3.99 to €14.99 per model, exact flat facets at real size in millimeters.+ - A faceting diagram for a gem cutter (GemCad .asc design, tier table with angles, indices and cutting order, and a printable diagram) for a round brilliant, a step cut, a fancy shape or a historic cut: [the cut library](https://digitalgemology.com/cuts/), 38 cuts, €3.99 to €14.99 per cut.+ - Most cuts are sold as two products: the 3D files (STEP, 3DM, STL, OBJ, FBX, GLB, in millimeters at real size) and the cutting files (GemCad .asc design, .csv tier table, printable faceting diagram), €3.99 to €14.99 each. The Radiant Cut and Heart Cut come as 3D files only, as do the Platonic solids. Each cut's line below lists what it sells, with its checkout links.+ - Refunds: a consumer may withdraw within 14 days of buying, even after downloading, for a full refund. A faulty file is always repaired, replaced or refunded. [Terms, Articles 10 and 11](https://digitalgemology.com/terms#withdrawal)+ - Bundles of ten cuts cost less than the single files: https://digitalgemology.com/cuts/#bundles+ - Free sample, to test the files in your software: the cube in all six 3D formats, for an email address: https://digitalgemology.lemonsqueezy.com/checkout/buy/2d1ab55f-2bd6-4897-a4cd-f3320f54e99e+ ## For AI agents and developers+ - MCP server: https://digitalgemology.com/mcp (Streamable HTTP, no key). Tools: search_cuts, get_cut, best_cuts_for_gemstone, cut_in_gemstone, list_gemstones, get_cut_scores, compare_cuts, recommend_cut. Server card: https://digitalgemology.com/.well-known/mcp/server-card.json+ - Gem identification MCP server: https://digitalgemology.com/mcp/gems. Tools: gem_properties, identify_gem (refractive index, birefringence, specific gravity, pleochroism, spectrum lines), compare_gemstones, absorption_spectrum. Seven gemstones from our tools, and the other common gems and diamond simulants from published references, with their sources.+ - Gemology lessons MCP server: https://digitalgemology.com/mcp/learn. Tools: search_lessons, get_lesson, explain_term, list_courses.+ - Gem data as JSON: https://digitalgemology.com/api/gems.json. All lessons as JSON: https://digitalgemology.com/api/learn.json+ - REST API, read-only, no key: https://digitalgemology.com/api/cuts?q=asscher, https://digitalgemology.com/api/cuts/<slug>, https://digitalgemology.com/api/gemstones/<stone>, https://digitalgemology.com/api/gemstones/<stone>/<slug>. OpenAPI: https://digitalgemology.com/api/openapi.json. API catalog: https://digitalgemology.com/.well-known/api-catalog+ - The whole library as one JSON file: https://digitalgemology.com/api/catalog.json+ - Shopping agents (Universal Commerce Protocol): profile https://digitalgemology.com/.well-known/ucp, REST under https://digitalgemology.com/ucp. Catalog search and lookup, and checkout sessions that hand the buyer to the Lemon Squeezy checkout through continue_url (no payment handlers: an agent builds the order, the person pays).+ - A2A agent: https://digitalgemology.com/a2a (JSON-RPC, A2A 1.0 and 0.3), card https://digitalgemology.com/.well-known/agent-card.json. Plain text or a data part naming a skill (the MCP tool names).+ - Any page answers `Accept: text/markdown` with its Markdown copy.+ - No sign-in, key or cookie for anything above: https://digitalgemology.com/auth.md. The Account page and its Sign in with Google+ (https://digitalgemology.com/account, https://digitalgemology.com/auth/) are for people in a browser only; agents skip them.+ - [AI agents and the Digital Gemology API](https://digitalgemology.com/about/agents): how to connect, every endpoint and tool, and how to cite the cuts.+ - [Connect your AI to Digital Gemology](https://digitalgemology.com/about/connect-ai): step-by-step setup of the four MCP servers in Claude, ChatGPT, Cursor, VS Code and other apps.+ - [3D Gemstone Simulator](https://digitalgemology.com/tools/3d_gemstone_simulator): A live, ray-traced 3D gemstone simulator for 41 cuts and 5 Platonic solids in 30 gemstones: set carat, color and clarity, turn the stone, and read its 3D gemstone report, measured from each cut's own 3D model.+ - [Cut Performance Wheel](https://digitalgemology.com/tools/cut-performance-wheel): Compare how a cut performs: brilliance, fire, scintillation and five more measures, against the T73 benchmark or any other cut, in thirty gemstones. Free, in your browser.+ - [Refractometer](https://digitalgemology.com/tools/refractometer): A gem refractometer in your browser: choose one of thirty gemstones and a cut, read the shadow edges on the eyepiece scale, see the light on the glass, and learn why diamond reads over the limit. Free.+ - [Gem Cuts: 3D Models & Faceting Diagrams](https://digitalgemology.com/cuts/): 40 gem cuts as 3D models and GemCad faceting diagrams: brilliants, fancy, step, historic and house cuts, in 26 gemstones. Plus the Platonic solids in 3D.+ - [T73 Round Brilliant Cut](https://digitalgemology.com/cuts/t73-round-brilliant): 3D model and faceting diagram · 73 facets · 8.15 x 8.15 mm · The same 1919 round brilliant proportions as the T57, with a sixteen-facet girdle band: 57 facets plus 16 girdle facets. Most round brilliants are finished this way today. Buy: 3D files €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/ef4dd7c5-5809-4458-9eff-1beb80ed52c0; cutting files €6.99: https://digitalgemology.lemonsqueezy.com/checkout/+ - [T105 Round Brilliant Cut](https://digitalgemology.com/cuts/t105-round-brilliant): 3D model and faceting diagram · 105 facets · 8.19 x 8.19 mm · The 1919 round brilliant with 48 more facets and no girdle band. Like the T57, its crown and pavilion meet at a knife edge. The main facets keep their angles. The added facets are a little steeper and divide the plan more finely. Buy: 3D files €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/44e9f0a8-a8b8-4d78-b1a5-d837fbd8c845; cutting fi+ - [DG-Vitruvio Cut](https://digitalgemology.com/cuts/dg-vitruvio): 3D model and faceting diagram · 265 facets · 8.15 x 8.15 mm · DG-Vitruvio is the 1919 round brilliant plan at its finest subdivision. It has the 57 facets of the T-series and a girdle band of 96 facets. The crown and pavilion keep the classic proportions. All the extra work is at the girdle. Buy: 3D files €14.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/8b7e2e3a-e008-4a2f-9bbe-a04552795fc0; cutting files €12.99: http+ - [DG-Anteros Cut](https://digitalgemology.com/cuts/dg-anteros): 3D model and faceting diagram · 73 facets · 8.15 x 8.15 mm · DG-Anteros is a 73-facet round brilliant re-solved for moissanite. It keeps the T73's architecture and 53% table, but it eases the crown and shifts the pavilion cone. This is because moissanite bends light more strongly than diamond, the stone that the 1919 proportions were calculated for. Buy: 3D files €14.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/2e4ad6f+ - [DG-Broken Hearts and Arrows Cut](https://digitalgemology.com/cuts/dg-broken-hearts-and-arrows): 3D model and faceting diagram · 89 facets · 8.15 x 8.15 mm · DG-Broken Hearts and Arrows is designed specifically for diamond. It is the T73 round brilliant with sixteen narrow crack facets added to the pavilion, 89 facets in all. The crack facets are in eight pairs, one facet on each side of the axis of each heart. Each pair is on the ridge where two lower girdle halves meet between the mains. The+ - [Baguette Cut](https://digitalgemology.com/cuts/baguette): 3D model and faceting diagram · 21 facets · 9.60 x 4.86 mm · The baguette: a slim rectangular step cut with few facets and straight, clean lines. It is the classic side stone beside a larger center stone, and the building block of channel-set bands. Buy: 3D files €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/f98a5f9b-a25e-4ed5-a5cc-92444ae9b2a0; cutting files €6.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/f+ - [Emerald Cut](https://digitalgemology.com/cuts/emerald-cut): 3D model and faceting diagram · 57 facets · 8.47 x 5.65 mm · The emerald cut: a rectangular step cut with cropped corners and a long, open table. The cropped corners protect a brittle stone at its weakest points. That is how the cut got its name. Buy: 3D files €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/7a254e34-3548-40df-9016-7f9f42e19852; cutting files €6.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/6f+ - [Marquise Cut](https://digitalgemology.com/cuts/marquise): 3D model and faceting diagram · 87 facets · 12.22 x 5.93 mm · The marquise, or navette: an elongated brilliant pointed at both ends. For its weight, our model faces up 21% larger than our T73 round, and in our library only the Rectangle matches it. This makes a stone look bigger on the finger. Buy: 3D files €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/dbc4977f-fe54-4713-9e6c-49d605979d87; cutting files €6.99: https://di+ - [Oval Cut](https://digitalgemology.com/cuts/oval): 3D model and faceting diagram · 97 facets · 9.00 x 6.76 mm · The oval brilliant: an elongated round, with the brilliant facet plan stretched along one axis. It faces up larger than a round of the same weight and flatters the finger. Buy: 3D files €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/ce77b9f0-180a-4d41-b13f-f0b5f9e02b99; cutting files €6.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/b82abdce-69d2-46a4-819d-1a+ - [Pear Cut](https://digitalgemology.com/cuts/pear): 3D model and faceting diagram · 64 facets · 10.28 x 6.84 mm · The pear: a brilliant with one rounded end and one point, halfway between an oval and a marquise. Buy: 3D files €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/19f3d75d-2a04-447b-b0f8-19c1445e9a2e; cutting files €6.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/d889ac63-e435-420a-a780-1ffe91601386.+ - [Radiant Cut](https://digitalgemology.com/cuts/radiant): 3D model · 74 facets · 9.06 x 7.06 mm · The radiant: the outline of a step cut, with cropped corners, and a brilliant facet plan. It combines the clean shape of an emerald cut with the sparkle of a brilliant. Buy: 3D files €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/37db9344-72d1-4dac-89e9-88dc3539c639.+ - [Rectangle Cut](https://digitalgemology.com/cuts/rectangle): 3D model and faceting diagram · 45 facets · 8.87 x 5.89 mm · A rectangular step cut with clean, wide steps and square corners. It is simpler than an emerald cut and has no cropped corners. Buy: 3D files €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/1e627cbe-69a3-44f0-a5da-e5cab29131b8; cutting files €6.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/1d8e7f45-2f16-44f2-8215-0aea13e29c3b.+ - [Teardrop Cut](https://digitalgemology.com/cuts/teardrop): 3D model and faceting diagram · 74 facets · 10.10 x 6.99 mm · A softened pear outline with a fuller shoulder, rounder and more forgiving than the classic pear. Buy: 3D files €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/01c7537a-8b6a-442f-867e-ae2a8b7c65d8; cutting files €6.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/a8b50d8b-0e3a-4a12-a271-9683c321c40c.+ - [Asscher Cut](https://digitalgemology.com/cuts/asscher): 3D model and faceting diagram · 58 facets · 6.77 x 6.77 mm · The Asscher: a square step cut with deeply cropped corners. The corners give it an octagonal outline and the concentric 'hall of mirrors' look of its stepped pavilion. Buy: 3D files €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/3f478563-162b-489c-afd5-5086170b053f; cutting files €6.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/6113a4c7-5d19-46be-99a5-+ - [Cushion Cut](https://digitalgemology.com/cuts/cushion): 3D model and faceting diagram · 85 facets · 6.89 x 6.89 mm · The cushion: a square outline with rounded corners and a brilliant facet plan. It developed from the old mine cut. Its outline is soft and its flashes are generous. Buy: 3D files €9.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/0ab6b522-6f5e-4103-9be4-aa806b5cfb2b; cutting files €6.99: https://digitalgemology.lemonsqueezy.com/checkout/buy/5a6cedf6-d038-467c-a964-3cb
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