1.05 Ct. Blue Cobalt Spinel from Ceylon (Sri Lanka)

One transparent oval blue cobalt spinel, 1.05 carat, dimensions 6.80 by 4.82 by 4.21 millimeters, faceted with a mixed brilliant cut. Clarity grade very slightly included evaluated at eye level, vivid color intensity, and excellent polish. No enhancement, natural origin Ceylon Sri Lanka. Offered exclusively by The Natural Gemstone Company, this gem combines precise cutting with the uncompromising color that distinguishes true cobalt spinel, a stone prized by collectors and connoisseurs for its saturated, electric blue that remains unmistakable under varied light.

What makes this spinel truly singular are the delicate internal signatures that confirm its natural provenance and elevate it from a mere stone to a collectible artifact. Within the pavilion and near the girdle lie a scattering of microscopic pinpoint crystals and faint feathered growth trails that catch the mixed brilliant facets and break the light into layered depths. These inclusions are not flaws in the cosmetic sense, they are the gem’s fingerprint. At certain angles those tiny reflective crystals create pinprick highlights that dance against the vivid blue, while the slender growth lines lend a subtle silk-like texture that enhances the perception of depth and movement. Because the gem is very slightly included at eye level, the character these features add is visible to a trained eye without detracting from the gem’s overall transparency or brilliance, and they serve as trustworthy evidence of an untreated, natural origin. For the collector who seeks rarity, these internal markers are desirable and reassure provenance in ways that tests alone cannot communicate.

Owning this oval cobalt spinel means possessing a piece of Ceylon’s geological history, a gem that reads as both jewelry and heirloom. The mixed brilliant cut maximizes fire and liveliness while preserving the stone’s signature inclusions, making it ideal for a bespoke setting that celebrates rather than conceals its character. At The Natural Gemstone Company we present this gem as part of a very limited offering, a solitary opportunity to claim a naturally vivid, untreated spinel whose internal features make it unmistakably authentic and uniquely yours.