Ministry of Gems — Gemmology & Gemstones

not graded

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

About this server

The au.com.ministryofgems/gemmology server provides gemology reference with 215 FGAA terms, 25 handbooks, live gem stock and signed passport verification. It uses streamable-http transport. Tools include define_gem_term, search_gem_knowledge, list_gem_terms, verify_gem_passport, search_gem_inventory, sapphire_price_guide, gem_properties and compare_gems.

Categories: market-data

Remote URL: https://mog-concierge.33guruge.workers.dev/mcp

Repository:

Transport: streamable-http

First seen: 2026-10-17T23:06:01 Last seen: 2026-10-20T08:40:07

30-day uptime: 1.0%

Verified data

Not yet checked — owners can claim this listing to enable price-accuracy checks

Tools

Name	Description	Input keys
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.	term
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.	limit, query
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.	section
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, tre	stone_id
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,	in_stock_only, limit, max_carat, max_price_aud, min_carat, min_price_aud, query, type
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	carat, origin
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, "tsavori	species
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".	gem_a, gem_b
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.	month
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.	gemstone
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.	handle
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 unrec	lab, report_number
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, eme	carat, shape, species

Issues

No issues found

Install

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

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

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