7.43 ct. Cassiterite
Color: Light / Medium Brown
Clarity: Eye Clean to Slightly Included
Origin: China
Cut: Shield
Treatments: None
Measurements: 13 x 9.1 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. Additionally, there is some great color zoning that is classic for the species - while the gem is primarily a very light brown there are ‘whisps’ of darker brown, a look that could really only be Cassiterite. Reasonably hard (7 on the Moh's scale) for a rarity as well.
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