Ceylon Gem PassportImmutable Snapshot · V1

CEYLON GEM PASSPORT

PUBLIC GEMSTONE RECORD

Blue Sapphire

Blue Sapphire

RECORD ID · CGP-26-000001

Gemstone Lifecycle Evidence

4-Stage Provenance Chain

Verified rough stone shape, inclusion microscopy, preformed gem view, and finished cut

Rough-to-Cut Traceability
Physical Mass Retention & Yield ProgressionTotal Yield: 27.5%
1. Rough Crystal12.45 ct100% Mass Baseline
2. Blocked Preform6.8 ct54.6% Retained
3. Finished Gem3.42 ct27.5% Final Yield
Rough MaterialPreform Grinding LossFinal Polished Gem
Rough Corundum Crystal
Hexagonal Barrel Crystal Morphology12 October 2026
rough Stage

Rough Corundum Crystal

Hexagonal Barrel Crystal Morphology

Evidence Attached
Weight12.45 ct
Form / CutHexagonal barrel with alluvial patina
Dimensions18.2 × 13.5 × 11.4 mm
RetentionInitial extraction mass (100%)
Gemological Findings & Evidence Log

Naturally tumbled alluvial hexagonal corundum crystal extracted from Elahera Illam gravels. Distinct basal pinacoid terminations, prominent rhombohedral striations, and residual iron-stained alluvial matrix in surface indentations.

Elahera Artisan Cooperative #04
Pithead Mining Docket & GPS Survey

Diagnostic Microscopic Inclusions Analysis

40× to 60× Optical Zoom · Darkfield Stage & Oblique Fiber-Optic Illuminator

Unheated Diagnostic
Diagnostic Microscopy Inclusions
40× Darkfield Field of View
Observed Microscopic Features
Dense unheated rutile (TiO2) silk needles crossing at 60°/120° angles
Undisturbed two-phase (liquid-gas CO2) inclusions with zero thermal explosion diskettes
Healed tension fissures forming fluid droplet "fingerprints"
Hexagonal planar color banding parallel to prism faces
Diagnostic Gemological Significance

Definitive proof of unheated natural corundum from Sri Lankan metamorphic alluvial deposits. Zero discoidal stress fractures, absence of rutile silk dissolution, and intact liquid phases conclusively rule out any thermal enhancement.

Verified via Reference Report: SSEF-2026-98412 (Swiss Gemmological Institute SSEF)

Stone information

Physical Specifications
VarietyBlue sapphire
Weight3.42 ct
Shape & CutOval · Oval mixed cut
Dimensions9.2 × 7.1 mm
TransparencyTransparent

Available evidence

Verification Scopes
Species identificationLaboratory examination docket verified
Report linked
Source locationPithead origin declaration
Declared
Rough-to-cut matchPhotographic, yield & weight lineage mapped
Report linked

External laboratory examination

Independent Lab Findings
Swiss Gemmological Institute SSEF
Issuer Confirmed

Report: SSEF-2026-98412 · Examination Date: 2026-10-15

“Natural Corundum Blue Sapphire. No indications of heating. Origin opinion: Ceylon (Sri Lanka).”
Authenticity & Privacy Notice:

This record is an immutable public snapshot generated from approved gemological data. It does not disclose private counterparty identities, transaction amounts, or internal invoices. Ceylon Gem Passport documents submitted records and does not act as a certifying laboratory or valuation authority.

Immutable Snapshot · Published under Ceylon Gem Passport Protocol v1.0
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