Permanent Gemstone Record
1.29 ct Blue Sapphire — Round Mixed Cut
$565.00
Collector Evaluation
The Otzera 50
Discovery
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
Inky blue color gives this 1.29 ct natural Tanzanian sapphire a distinctive, understated elegance. The round mixed cut reveals flashes of blue as the stone moves, while its pleasingly clear appearance lets you explore the facets within. At approximately 6.2 mm across, it is an attractive choice for a classic setting or a collection of blue gemstones.
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-2026-01770 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.