Permanent Gemstone Record
3.53 ct Blue Spinel — Oval Mixed Cut
$1,395.00
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
Cool steel-blue color and an elongated oval shape give this natural spinel a distinctive elegance. Broad facets catch silvery reflections and flashes of blue as the viewing angle changes. At 3.53 ct and 12.5 mm long, it has a generous presence that would suit a statement pendant, a bespoke ring, or a collection exploring the many shades of blue.
Visual Record
Media Archive
Ownership
Care & Handling
Clean gently 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-2026-01765 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.