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The back of the twin has a “rub” which keeps it from being completely perfect
The twins on this specimen are some of the largest I’ve seen from the locality
A six-inch display specimen from Sferlun is certainly hard to come by and the majority of the hundreds of crystals on this attractive specimen are damage free
Colorado was a prominent figure and collector of Colorado minerals
Specimen # BOL711B84
Cassiterite on Quartz amber The back of the twinThis particular piece is a superb quality Cassiterite from the standpoint of luster, sharpness and the fact that there are TWO distinct twinning habits on the same specimen. An impressive, classic, sharp, lustrous group of black to gemmy golden color cyclic twinned crystals sit atop prismatic white Quartz matrix. The most interesting aspect of the piece is the fact that there are a few RARELY seen drillbit habit twinned groups. Its not common to find
US$ 102.50
US$ 114.50
US$ 18.06
