Gemstone: Sapphire - 2.25 Cts. Umba River (U...Click the image to load the highest resolution version.
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DescriptionGemstone: Sapphire - 2.25 Cts.
Umba River (Umba Valley)
One of the "Big Three" gemstones, this natural 2.25 carat stone is a coveted Sapphire. This gem has a lovely "royal" blue body color and, when viewed face-up, the stone displays strong violetish-blue and purpleish-violet pleochroism. This stone is thought to be unheated, and the natural inclusions support this observation. There is a wealth of undisturbed mineral crystals and Bohmite needles within the stone that would have been damaged by any heat treatment. There is indeed much to like about this colored gemstone which shows no visible blemishes.
Measurements: 8.17 x 7.23 x 4.88 mm, 2.25 cts.
Provenance: The Jena Blue Collection
Estimate: $2,000 - $3,000.
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