7.15 Ct. Blue Sapphire from Ceylon (Sri Lanka)

From the mines of Ceylon to your hands, this transparent 7.15 carat radiant shape blue sapphire carries the quiet legacy of Sri Lankan gem country, a story The Natural Sapphire Company cherishes and preserves. Mined by experienced local diggers who have worked the alluvial gravels and rock veins for generations, this sapphire began as a rough crystal of corundum shaped by geological time. Its dimensions of 12.06 by 8.96 by 6.22 millimeters reflect a careful balance between weight and proportion, chosen to honor the stone as it emerged from its native earth. Unheated, untreated, and free of enhancement, the gem retains the honest faint blue tone that makes Ceylon sapphires so evocative, its eye clean clarity confirmed at standard viewing distances, and its excellent polish the result of deliberate cutting decisions made to reveal both purity and personality.

The journey from rough to radiant cut reveals the sapphire structure and explains its unusually lively sparkle, a spectacle born of corundum chemistry and masterful faceting. As an aluminum oxide crystal with a refractive index around 1.762 to 1.770 and a small but meaningful birefringence, this sapphire bends and splits light in ways that create depth and internal movement, while its radiantly faceted pavilion and crown turn those optical properties into scintillation and fire. The radiant cut combines trimmed corners with a brilliant facet pattern that multiplies light return, sending a network of flashes across the table and along the shoulders, and the excellent polish ensures those flashes arrive crisp and clean. At eye level the gem is clear and lively, with the faint Ceylon color giving each flash a silvery blue whisper rather than a flat tone, and subtle pleochroic tendencies of corundum add shifting notes depending on the angle of view. For someone seeking a sapphire with geological provenance, natural integrity, and a cut that translates structure into unmatched sparkle, this 7.15 carat Ceylon radiant sapphire from The Natural Sapphire Company is a rare conversation between earth and craftsman, ready to become the centerpiece of a ring, pendant, or heirloom piece that will be worn and passed on.