Ministry of Gems — Gemmology & Gemstones
au.com.ministryofgems/gemmologyGemology & gemmology: 215 FGAA terms, 25 handbooks, live gem stock, signed passport verification.
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Tools · 13
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. U…
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 res…
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.
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 …
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 Au…
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…
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), fro…
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 di…
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 …
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…
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 dir…
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, incl…
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, eme…
Resources · 26
215 gemmological terms across 10 subject sections, FGAA-verified.
mog://lexicon
9,474 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/sapphire-buyers-handbook
mog://handbook/sapphire-buyers-handbook
8,162 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/opal-buyers-handbook
mog://handbook/opal-buyers-handbook
7,923 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/ruby-buyers-handbook
mog://handbook/ruby-buyers-handbook
7,930 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/emerald-buyers-handbook
mog://handbook/emerald-buyers-handbook
8,067 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/price-of-colour-handbook
mog://handbook/price-of-colour-handbook
8,068 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/engagement-ring-buyers-handbook
mog://handbook/engagement-ring-buyers-handbook
7,870 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/field-guide-to-coloured-stones
mog://handbook/field-guide-to-coloured-stones
8,138 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/the-ministry-magazine
mog://handbook/the-ministry-magazine
8,363 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/gem-market-report-2026
mog://handbook/gem-market-report-2026
8,269 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/gem-certification-handbook
mog://handbook/gem-certification-handbook
8,077 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/bespoke-ring-design-handbook
mog://handbook/bespoke-ring-design-handbook
8,337 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/gemstone-care-handbook
mog://handbook/gemstone-care-handbook
11,380 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/read-natural-vs-lab-grown-handbook
mog://handbook/read-natural-vs-lab-grown-handbook
11,231 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/read-padparadscha-handbook
mog://handbook/read-padparadscha-handbook
12,023 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/read-birthstone-handbook
mog://handbook/read-birthstone-handbook
12,322 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/read-provenance-handbook
mog://handbook/read-provenance-handbook
9,686 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/read-teal-parti-sapphire-handbook
mog://handbook/read-teal-parti-sapphire-handbook
9,587 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/read-spinel-handbook
mog://handbook/read-spinel-handbook
9,825 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/read-online-gem-buyers-handbook
mog://handbook/read-online-gem-buyers-handbook
9,959 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/read-ceylon-treasury-handbook
mog://handbook/read-ceylon-treasury-handbook
11,622 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/read-jewellery-buyers-handbook
mog://handbook/read-jewellery-buyers-handbook
12,401 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/read-gold-precious-metals-handbook
mog://handbook/read-gold-precious-metals-handbook
12,490 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/read-insurance-valuation-handbook
mog://handbook/read-insurance-valuation-handbook
12,039 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/read-diamond-buyers-handbook
mog://handbook/read-diamond-buyers-handbook
7,851 words, full text indexed by section. Free to read and cite at https://ministryofgems.com.au/pages/the-orientation-premium
mog://handbook/the-orientation-premium
Prompts · 3
Guide a buyer from colour, budget and wear to two or three live Ministry of Gems stones, with prices and verifiable passports.
Verify a stone's signed record, then explain to the buyer what the record proves and what it does not.
A neutral comparison from the physical properties and The Diamond Buyer's Handbook, ending with what the money actually buys.
How to use
Add to your Claude Desktop / Cursor / Cline MCP config:
{
"mcpServers": {
"ministry_of_gems_\u2014_gemmology_\u0026_gemstones": {
"url": "https://mog-concierge.33guruge.workers.dev/mcp",
"transport": "streamable-http"
}
}
}