Sapphire UMBA Untreated Icy Sky Blue Cushion Cut 1.09 Cts.

This rare, 100% unheated Sapphire from UMBA valley alluvial deposit showcases a captivating icy sky-blue hue paired with a fascinating, nature-made geometric web of silvery-grey and warm, brownish-yellow Rose channels. Sourced from Tanzania’s legendary Umba Valley, these organic, needle-like lines are formed by microscopic, hollow structural tubes that have been naturally tinted by iron oxide over millions of years. Far from ordinary flaws, these striking grey and tan geometric features serve as a coveted badge of authenticity, offering collectors and jewelry connoisseurs indisputable proof of a completely untreated, unheated origin that makes this one-of-a-kind gemstone perfect for a bespoke, statement design. In the hand this stone is brilliant and