Permanent Gemstone Record
1.51 ct Deep Blue Sapphire — Oval Mixed Cut
$695.00
Collector Evaluation
The Otzera 50
Collectible
Otzera Classification
The Otzera 50 organizes professional gemstone evaluation into a single transparent framework, scored relative to what is achievable within this species. It reflects the qualities that make an individual stone worth collecting.
Identity
Gemological Summary
Disclosure
Origin & Treatment
Expert Curation
Why Otzera Selected It
Deep blue color and a graceful oval shape give this 1.51 ct natural sapphire a classic appeal. Its mixed cut reveals blue flashes as the viewing angle changes, and the elongated outline offers an elegant presence at 7.9 mm long. A versatile stone for a personal collection or a bespoke ring or pendant.
Visual Record
Media Archive
Ownership
Care & Handling
Clean with lukewarm water, mild soap and a soft brush. Protect from hard knocks and sudden temperature changes.
A permanent record of this exact gemstone
This Digital Passport is tied to OTZ-2026-01764 and remains accessible after the gemstone leaves available Otzera inventory. The QR code on the case always resolves to this canonical record rather than to a temporary sales page.
The Otzera 50 is a founder-led, species-relative collector rating. It is not a laboratory grade, appraisal, price guarantee, investment representation or universal ranking across all gemstones. Identity, treatment, origin evidence, laboratory documentation and condition are disclosed separately where applicable.