29/09/2026
11.63 ct Natural Blue Spinel | GRS | Untreated
A night-sky blue. 💎
This 11.63 -carat cushion spinel is the quiet counterpart to the vivid red Spinel from my last post, with no-heat,this is a completely different kind of rarity. Blue spinel in this size is scarce. Most fine blues stay well under 5 carats. Stones that break 10 carats and stay untreated almost never come to market.
GRS-certified natural spinel.
The face-up footprint is generous — over 12 mm — so the color apear as a deep, even blue rather than a small spark. Mixed brilliant/step cutting keeps the reflection of light moving across the facettes.