Ministry of Gems — Gemmology & Gemstones MCP Server

by com-ministryofgems Your server? Claim it

answering

Ministry of Gems — Gemmology & Gemstones is answering right now. Last checked 4 min ago. It exposes 13 tools.

Gemology & gemmology: 215 FGAA terms, 25 handbooks, live gem stock, signed passport verification.

Uptime history 39 days of history · worst day 95%

39 days agonow

94.5%

Uptime 24h

86 of 91 checks

Tools

read from the server

154 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 18

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 23 August 2026. No other catalogue keeps this.

18 Sep 10 tools appeared birthstone_for_month, compare_gems, faceup_size_estimate and 7 more

18 Sep 2 tool descriptions were rewritten define_gem_term, search_gem_knowledge

18 Sep a tool changed version2 times that day

30 Aug a tool description was rewritten search_gem_knowledge

25 Aug a tool description was rewritten search_gem_knowledge

25 Aug a tool changed version

23 Aug a tool description was rewritten search_gem_knowledge

and 1 more, back to 23 August 2026

Ministry of Gems — Gemmology & Gemstones does not always answer

Over the last week it answered 97.7% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 4 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add gemmology --transport http https://mog-concierge.33guruge.workers.dev/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "gemmology": {
      "url": "https://mog-concierge.33guruge.workers.dev/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.gemmology]
url = "https://mog-concierge.33guruge.workers.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "gemmology": {
      "url": "https://mog-concierge.33guruge.workers.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "gemmology": {
      "url": "https://mog-concierge.33guruge.workers.dev/mcp"
    }
  }
}

Available tools 13

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

gem

gem_care_guide

Whether warm soapy water, an ultrasonic cleaner or a steam cleaner is safe for a given gemstone, plus everyday-wear notes, from the FGAA-reviewed care table. Covers sapphire and ruby, diamond, emerald, opal, pearl, tanzanite, tourmaline and more.

gem_properties

Mohs hardness, refractive index, specific gravity, birefringence and crystal system for a gem species (diamond, corundum/sapphire/ruby, emerald, spinel, opal, tourmaline, garnet, quartz and more), from the FGAA-reviewed Gem Data Tables. Accepts trade names — "sapphire" resolves to corundum, "tsavorite" to garnet.

get_gem_product

Full detail for one Ministry of Gems product by handle or URL: specifications, description, price in AUD, availability, variants, images, the Digital Gemstone Passport link for loose stones, and a direct checkout link. Use after search_gem_inventory.

list_gem_terms

List the gemmological terms available in The Gem Lexicon, optionally filtered to one subject section. Use this to discover what can be defined before calling define_gem_term.

search_gem_inventory

Search the live Ministry of Gems catalogue of natural loose gemstones and finished jewellery — Ceylon and Australian sapphires, rubies, spinels, Australian opals, emeralds and more — with prices in Australian dollars, availability, carat weight and a link to buy. Filter by type (gems, ring, pendant, earrings), carat range and price range. Every loose gem returned carries a verifiable Digital Gemstone Passport.

search_gem_knowledge

Keyword search across the Ministry of Gems gemmological reference library — 215 lexicon definitions and 25 full-length buyer's handbooks, searched in full text across every section. Returns ranked results, each with the matched passage and a citable URL that deep-links to the chapter.

birthstone

birthstone_for_month

The modern and traditional birthstones for a month, from the FGAA-reviewed table, with a link to The Birthstone Handbook for history, treatments to expect and buying guidance. Accepts a month name or number.

compare

compare_gems

Side-by-side physical properties of two gem species with a plain verdict on which is harder, and a note on toughness — the half of durability the hardness scale does not show. Good for "sapphire or diamond for an everyday ring".

define

define_gem_term

Look up a gemmological term in The Gem Lexicon of Ministry of Gems — 215 definitions verified by an FGAA-qualified gemmologist. Returns the definition, its subject section, and a citable anchor URL. Use for terms such as padparadscha, corundum, parti sapphire, unheated, or asterism.

faceup

faceup_size_estimate

Approximate face-up millimetre dimensions for a stone of a given species, shape and carat weight — and, unlike diamond-only calculators, corrected for specific gravity, so a 2 ct sapphire, spinel, emerald or opal is sized correctly rather than as if it were diamond. Shapes: round, oval, cushion, emerald, pear, marquise, princess, radiant, heart, trillion.

lab

lab_report_check

The issuing laboratory's own verification page and a four-step checklist for confirming a gemstone or diamond grading report — GIA, IGI, GRS, SSEF, Gübelin, AGL, Lotus, GIT, HRD, GCAL and others, including the coloured-stone laboratories diamond tools omit. Explains what "FGAA" means and flags unrecognised lab names. Routes to the lab; does not verify the report itself.

sapphire

sapphire_price_guide

What natural sapphires actually cost per carat in Australian dollars, from Ministry of Gems' published price guide: bands by origin (Australian, Ceylon) and size, with the stone count behind each band and the date the bands were computed. Answers "how much is a 2 carat sapphire" honestly, as a house guide rather than a market index.

verify

verify_gem_passport

Cryptographically verify a Ministry of Gems Digital Gemstone Passport by stone ID. Recomputes the SHA-256 digest of the signed record and checks its Ed25519 (EdDSA) signature against the house public key, then returns the attested record: species, carat, dimensions, cut, colour, clarity, origin, treatment and certificate status. Use when a buyer asks whether a stone or its passport is genuine, or before quoting any fact about a specific Ministry of Gems stone.

Endpoints

URL	Transport	State	Latency	Checked
https://mog-concierge.33guruge.workers.dev/mcp	streamable-http	answering	205 ms	4 min ago

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Ministry of Gems — Gemmology & Gemstones — questions

Answers built from our own checks of this server.

What can Ministry of Gems — Gemmology & Gemstones do?

It exposes 13 tools, read directly from the server on our last check. Among them: birthstone_for_month, compare_gems, define_gem_term, faceup_size_estimate, gem_care_guide, gem_properties and 7 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Ministry of Gems — Gemmology & Gemstones working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 86 of 91 checks got a reply (94.5%), average response time 154 ms. The bar chart above shows every period we have measured.

How do I connect Ministry of Gems — Gemmology & Gemstones?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Ministry of Gems — Gemmology & Gemstones need an API key?

No. Ministry of Gems — Gemmology & Gemstones completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 13 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Ministry of Gems — Gemmology & Gemstones?

It answers our handshake in 154 ms on average, which is faster than 87% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.