Umba sapphire 1.25ct

Silvery-Gray Umba Sapphire — 1.25 ct (Natural, Untreated) 6.7mm

Cut from rough by hand, this 1.25 carat Umba sapphire reflects a calm metallic tone — a silvery gray that shifts softly under natural light. The stone carries a silky crystalline structure, yet remains clear enough for each facet to radiate a diffused, glasslike glow.

This piece marks a personal milestone — the first larger sapphire I chose to cut, after weeks of practice on smaller stones. Every facet demanded patience, precision, and restraint — a quiet conversation between yield and symmetry.

Sourced from Tanzania’s Umba Valley, these sapphires are renowned for their unpredictable hues — subtle grays, violets, and mists shaped by the valley’s ancient mineral veins. This one is natural and untreated, with only the faintest internal crystals visible under 20x magnification near the crown — a testament to both its authenticity and purity.