A cushion-cut sapphire from Tanzania’s Umba Valley, showing a vivid blue color with a touch of silvery undertone that shifts slightly in different lighting. The cut balances depth with brilliance, producing crisp flashes that move cleanly across the stone. Umba sapphires are known for their wide spectrum of colors, and the chemistry of the deposit often gives them subtle secondary tones that set them apart from sapphires of Sri Lanka or Madagascar.
This stone highlights the individuality of Umba material—bright, lively, and distinct from more commercial sources—making it equally appealing for jewelry or a specialized collection.
Photography is done with a 10x macro lens, so you may see details not visible to the unaided eye.
Popcorn bidding is in effect: bids placed in the last 5 minutes will extend the auction by 5 minutes
.80 carats / 5.4 x 4.6 x 3.7 mm
Estimate: $380 - $415
