Every change Wellknown observed on this MCP server, newest first, with what it was before and what it became. Tool-surface changes carry the definition diff. Nothing here is edited after the fact.
Changed the definition of "verify_gem_passport"
{"properties":{"active":{"description":"False when the house has revoked or superseded this passport.","type":"boolean"},"corpus_url":{"type":"string"},"digest_matches" ⟨27 unchanged words⟩ {"type":"boolean"},"status":{"description":"active, revoked or superseded.","type":"string"},"stone_id":{"type" ⟨7 unchanged words⟩ only when digest and signature both check out. A withdrawn passport can still be verified:true — read active/withdrawn before relying on the record.","type":"boolean"},"withdrawn":{"type":"boolean"},"withdrawn_on":{"type":"string"},"withdrawn_reason":{"type":"string"}},"type":"object"}
Certificate changed, valid to 2027-01-05
Changed the definition of "define_gem_term" and "search_gem_knowledge"
Only numbers and dates differ: this server embeds live figures in the definition, so the text moves without the contract changing.
⟨6 unchanged words⟩ The Gem Lexicon of Ministry of Gems —168215 definitions verified by an FGAA-qualified gemmologist. Returns the ⟨21 unchanged words⟩
Only numbers and dates differ: this server embeds live figures in the definition, so the text moves without the contract changing.
Keyword search across the Ministry of Gems gemmological reference library —168215
Added "birthstone_for_month", "compare_gems", "faceup_size_estimate" and 7 more (3 tools before, 13 now)
Birthstone by 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 two 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".
Face-up size for any gem species — 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.
How to clean and wear a gem — 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.
Certificate recorded, valid to 2026-11-07
Authorization not required
First tool surface recorded: 3 tools (server version 1.1.0)
Showing the latest 7 events. The API returns up to 500 and filters by kind: ?kind=tool_surface_changed
Gem physical 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.
Product detail — 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.
Where to verify a laboratory report — 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 price per carat (AUD) — 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.
Search Ministry of Gems stock — 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.
Verify a Digital Gemstone 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.