Is Digitalgemology free?

Yes, Digitalgemology is free to use.

How do I install Digitalgemology?

Digitalgemology is a remote plugin. You do not need to install anything locally. Add the server URL to your AI app's MCP configuration and you are ready to go.

Is Digitalgemology safe to use?

Yes. Digitalgemology passed MCP Marketplace's automated security scan with a score of 10/10 (low risk). Every server on MCP Marketplace is security-scanned before it's listed; see the full security report on this page for the findings and permissions.

What AI apps work with Digitalgemology?

Digitalgemology uses the Model Context Protocol (MCP) and works with any MCP-compatible AI app, including Claude, ChatGPT / Codex, Gemini, Copilot, Cursor, and more.

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Digitalgemology MCP Server

by Cultrodistro

Developer ToolsLow Risk10.0MCP RegistryRemote

Free

Server data from the Official MCP Registry

Gemology lessons to search and quote: the 4 Cs, diamond anatomy, grading reports, moissanite

About

Gemology lessons to search and quote: the 4 Cs, diamond anatomy, grading reports, moissanite

Remote endpoints: streamable-http: https://digitalgemology.com/mcp/learn

Security Report

10.0

Low Risk10.0Low Risk

Valid MCP server (1 strong, 1 medium validity signals). No known CVEs in dependencies. Imported from the Official MCP Registry.

4 tools verified · Open access · No issues found

Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.

Permissions Found in Source Code

Found by scanning the linked source code. This listing connects to a hosted endpoint, so none of this runs on your machine: it describes what the server software does where it is hosted.

HTTP Network Access

Connects to external APIs or services over the internet.

How to Connect

Remote Plugin

No local installation needed. Your AI client connects to the remote endpoint directly.

Add this to your MCP configuration to connect:

{
  "mcpServers": {
    "com-digitalgemology-gemology-lessons": {
      "url": "https://digitalgemology.com/mcp/learn"
    }
  }
}

Documentation

View on GitHub

From the project's GitHub README.

Digital Gemology MCP servers: cut library, gem identification, gemology lessons, glossary

Four remote Model Context Protocol servers from Digital Gemology:

Server	Endpoint	Registry name	What it does
Cut library	`https://digitalgemology.com/mcp`	`com.digitalgemology/cut-library`	Search 40 gem cuts and 5 Platonic solids; ray-traced brilliance, fire and scintillation in seven gemstones; compare cuts; recommend a cut; 3D models and GemCad faceting diagrams
Gem identification	`https://digitalgemology.com/mcp/gems`	`com.digitalgemology/gem-identification`	Gemstone properties; match refractive index, birefringence, specific gravity, pleochroism and spectrum lines to seven gemstones; tell two gems apart
Gemology lessons	`https://digitalgemology.com/mcp/learn`	`com.digitalgemology/gemology-lessons`	Search, read and quote 53 gemology lessons: the four Cs, diamond anatomy, grading reports, diamond vs moissanite, historic cuts, bow-ties
Gemology glossary	`https://digitalgemology.com/mcp/glossary`	`com.digitalgemology/gemology-glossary`	Define 328 gemology terms: every word on a diamond grading report, the four Cs, clarity characteristics, treatments, gem testing, colored gemstones, and how brilliance, fire and scintillation are measured

Transport: Streamable HTTP, stateless
Registry: official MCP Registry
Sign-in: none. Read-only and free to use.
Protocol versions: 2026-07-28, 2025-11-25, 2025-06-18, 2025-03-26

This repository holds the servers' public description, their registry listings and the open data they serve. The servers run on digitalgemology.com.

Cut library tools (`/mcp`)

Tool	What it does
`search_cuts`	Search the cut library by name, style, shape or use ("square step cut", "round brilliant for moissanite", "historic cushion"). Returns each cut's page, facets, size, price and checkout links; give a gemstone to sort by brilliance, fire and scintillation in that stone.
`get_cut`	Everything about one cut: measured specifications (facets, angles, depth, size, index gear), brilliance, fire and scintillation in all seven gemstones, prices and checkout links.
`best_cuts_for_gemstone`	The top ten brilliants and top ten jewelry cuts in one gemstone, with the stone's optical constants.
`cut_in_gemstone`	How one cut performs in one gemstone: eight measured scores against the T73 round brilliant, with pros and cons.
`list_gemstones`	The seven gemstones (diamond, moissanite, cubic zirconia, ruby, sapphire, emerald, amethyst) with refractive index, critical angle, dispersion, hardness and specific gravity.
`get_cut_scores`	The Cut Performance Index: overall, brilliance, fire, scintillation, tilt, symmetry, spread, shape-norm and leakage, in all seven gemstones.
`compare_cuts`	Two cuts side by side in one gemstone: place in the index, every figure, which cut is ahead on each, and links to buy.
`recommend_cut`	The best cuts for a gemstone, ranked by overall, brilliance, fire, scintillation, spread, tilt or leakage; filter by category or shape.

Gem identification tools (`/mcp/gems`)

The values that Digital Gemology's free Refractometer, Polariscope, Dichroscope and Spectroscope use, for diamond, moissanite, cubic zirconia, ruby, sapphire, emerald and amethyst. A match is a lead, not an identification: a laboratory report is the proof.

Tool	What it does
`gem_properties`	One gemstone: refractive index, birefringence, dispersion, specific gravity, hardness, crystal system, and what each instrument shows.
`identify_gem`	Give any readings (refractive index, birefringence, specific gravity, singly or doubly refractive, pleochroism, a spectrum line, over the refractometer limit). Returns which of the seven stones fit each reading.
`compare_gemstones`	Which tests tell two gemstones apart (for example diamond and moissanite), and which do not.
`absorption_spectrum`	The lines and bands a gemstone shows in a spectroscope, with their cause.

Gemology lessons tools (`/mcp/learn`)

Tool	What it does
`search_lessons`	Find lessons on a topic or question ("what is fire in a diamond").
`get_lesson`	The full text of one lesson as Markdown, by title or URL.
`explain_term`	Short passages from the lessons that explain a term ("critical angle", "pavilion angle"), each with its link.
`list_courses`	Every course and its lessons.

Gemology glossary tools (`/mcp/glossary`)

328 terms, each with its own page under digitalgemology.com/learn/glossary. Grading report terms follow GIA, with IGI where it differs.

Tool	What it does
`define_term`	One term ("crown angle", "feather", "fluorescence", "scintillation"): a short definition, more detail, where it appears on a grading report, how Digital Gemology measures it, related terms, and its page.
`search_glossary`	Find terms by a word or a question ("what do the girdle words mean", "why does a diamond sparkle").
`list_glossary`	Every term, or every term in one of 15 topics, with a one-line definition and its page.

Connect

Claude Code

claude mcp add --transport http digital-gemology https://digitalgemology.com/mcp
claude mcp add --transport http digital-gemology-gems https://digitalgemology.com/mcp/gems
claude mcp add --transport http digital-gemology-learn https://digitalgemology.com/mcp/learn
claude mcp add --transport http digital-gemology-glossary https://digitalgemology.com/mcp/glossary

Claude Desktop, Cursor, VS Code and other clients that take a JSON config:

{
  "mcpServers": {
    "digital-gemology": { "type": "http", "url": "https://digitalgemology.com/mcp" },
    "digital-gemology-gems": { "type": "http", "url": "https://digitalgemology.com/mcp/gems" },
    "digital-gemology-learn": { "type": "http", "url": "https://digitalgemology.com/mcp/learn" },
    "digital-gemology-glossary": { "type": "http", "url": "https://digitalgemology.com/mcp/glossary" }
  }
}

Try it with curl

curl -s https://digitalgemology.com/mcp \
  -H "Content-Type: application/json" -H "Accept: application/json, text/event-stream" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"best_cuts_for_gemstone","arguments":{"gemstone":"moissanite"}}}'

Other ways in

REST API: https://digitalgemology.com/api/cuts, /api/cuts/{slug}, /api/gemstones, /api/cut-index (OpenAPI)
JSON files: gem data, all lessons, the glossary, the whole cut library
A2A agent: https://digitalgemology.com/a2a (agent card)
For language models: llms.txt, and a Markdown copy of every page
Docs: digitalgemology.com/about/agents

Data

data/ holds the Digital Gemology Cut Performance Index: ray-traced light-performance scores for 40 gem cuts and 5 Platonic solids in seven gemstones, diamond, moissanite, cubic zirconia, ruby, sapphire, emerald and amethyst (315 rows; 37 cuts are scored, and the rest are listed with the reason). Ruby and sapphire are both corundum, so they share one set of figures; color and absorption are not part of the trace. The method and every column are explained on the index page.

License

The data and this documentation are licensed under CC BY 4.0: use and share freely, with credit to Digital Gemology and a link to https://digitalgemology.com. The 3D models and faceting diagrams the tools link to are sold separately under their own license.

Contact

support@digitalgemology.com

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