4.32 ct. Cassiterite
Color: Medium Dark Brown
Clarity: Eye Clean to Slightly Included
Origin: China
Cut: Triangle
Treatments: None
Measurements: 7.9 mm
Faceted Cassiterite has always been an appealing member of the collector class of gemstones. It is a tin mineral that is rare in gem quality, but when cut is quite impressive - it has both a high refractive index and an adamantine luster. These are quite dispersive as well - when nice, they are really lovely stones. We were extremely impressed by this very fine example of the species - great size and beautifully cut. The color is quite even for a stone this size - reasonably hard (7 on the Moh's scale) for a rarity as well.