Royal Blue Ceylon Sapphire 2.93ct Cushion — Unheated

Name: Royal Blue Ceylon Sapphire 2.93ct Cushion — Unheated
Brand: Ministry of Gems

STONE ID · 47005-15R

Identification photograph — this individual stone, as catalogued

Gem type: Sapphire
Origin: Ceylon (Sri Lanka)
Carat weight: 2.93 ct
Dimensions: 8.57 x 7.75 x 5.44 mm
Shape & cut: Cushion
Colour: Royal Blue
Tone & saturation: Medium tone, vivid saturation
Treatment: Unheated
Certification: Available on request

✓ Assessed in-house by our FGAA-qualified gemmologist, Sydney.

Treatment disclosure. No heat. This sapphire is recorded as unheated on the supplier's parcel documentation — it has undergone no thermal enhancement. Unheated stones of this size and colour represent a small fraction of world sapphire production. Independent laboratory confirmation can be arranged on request before purchase, and we encourage it at this level.

Full treatment disclosure · independent laboratory certification on request · free lifetime re-authentication — this stone may be returned to the house at any time, by any owner, for verification against this record.

Record Verification

This passport carries a cryptographic fingerprint of the stone’s canonical record. If any detail of this record were altered, the fingerprint would no longer match the house register.

MOG-47005-15R-2741-745B-2386

SHA-256: 2741745b2386fcf4334268a1c49be2528d4f159c1f6b588cbde1dfec1bff3eff

Version 2 record: the canonical payload is published in full and digitally signed by the house (JWS, Ed25519, key mog-passport-2026-1). The short code above is a convenience label only — verification recomputes the full digest.

Check this fingerprint against the house register →

Issued 2026-08-24 · What this verifies: the integrity of this record against the Ministry of Gems register — it is the house’s own record, not an independent laboratory certificate. Independent certification is available on request.

Record of Custody

2026-08-06 — Catalogued into the Ministry of Gems vault collection
2026-08-06 — Assessed in-house by our FGAA-qualified gemmologist; treatment status recorded in the public Treatment Register
2026-08-23 — Canonical record fingerprinted; independent passport verification enabled
2026-08-24 — Passport v2 issued: canonical payload published, full SHA-256 digest, house EdDSA signature (key mog-passport-2026-1)

This stone appears on the house Treatment Register — every stone we offer, its status public.
This passport is served live from the Ministry of Gems catalogue and can be checked against the signed Passport Register at any time.
Verify at any time: ministryofgems.com.au/products/royal-blue-ceylon-sapphire-2-93ct-cushion-unheated-47005-15r?view=passport
Rendered 04 October 2026 · Ministry of Gems® · Sydney, NSW · ABN 85 635 892 732

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