Cassiterite (cyclic twins) with Quartz and Siderite

Item Description

Bolivia has probably produced more tin than any other country in the world. The great tin mines at Viloco (sometimes called Araca) have produced some of the most magnificent Cassiterite specimens extant. This particular specimen hosts fine quality, very sharp, highly lustrous, cyclic twinned crystals of Cassiterite beautifully accenting, prismatic, gemmy, colorless Quartz. The color in the Cassiterites ranges from black to a deep brownish-golden color. The piece is in excellent shape overall, and the largest twin measures 6 mm across. These classic specimens from Viloco are simply not seen for sale in today's market, and to find crystal group with Quartz like this is not at all common!