Stibiotantalite has one of the highest refractive indexes in the gem world (2.37-2.45) and a very high specific gravity at around 6.7 (vs. 4.6 for Zircon and 3.5 for Diamond). These can be from a number of places worldwide, though clean stones in excess of 1 carat are always the benchmark. The color is a deep chocolate brown - not overly dark at all, the stone is bright and brilliant. Lots of life, beautifully cut and entirely clean. A rare stone to be sure.
$850 / carat - $1096 total
Color: Dark Brown
Clarity: Eye Clean
Origin: Afghanistan
Cut: Triangle
Treatments: None
Measurements: 6.9 x 4.7 mm
Stibiotantalite has one of the highest refractive indexes in the gem world (2.37-2.45) and a very high specific gravity at around 6.7 (vs. 4.6 for Zircon and 3.5 for Diamond). These can be from a number of places worldwide, though clean stones in excess of 1 carat are always the benchmark. The color is a deep chocolate brown - not overly dark at all, the stone is bright and brilliant. Lots of life, beautifully cut and entirely clean. A rare stone to be sure.
$850 / carat - $1096 total