Cylindrite is one of the most unusual of all minerals. It owes its name to its almost unique crystal habit, which iscylindrical. Only chrysotile, a variety of serpentine, also forms tubular crystals, but these are microscopically thin with the appearance of tiny hairs. Crystals of cylindrite are actually coiled sheets that grow as if rolled into pipes. Sometimes the sheets can become uncoiled if put under pressure. Cylindrite is occasionally mined as an ore of lead, tin and the rare element indium, which is used by the microelectronics industry in the manufacture of transistors and silicon chips. However, cylindrite is collected primarily for its very unusual crystal • habit. The majority of the best specimens of cylindrite crystals come from Bolivia - at Poopo in Oruro and at Potosi. Bolivian specimens are found in tin- rich mineralized veins and a re typically associated with similar minerals in the sulphosalt group such as franckeite, incaite, potosiite and tellaite.
Cylindrite is one of the most unusual of all minerals. It owes its name to its almost unique crystal habit, which iscylindrical. Only chrysotile, a variety of serpentine, also forms tubular crystals, but these are microscopically thin with the appearance of tiny hairs. Crystals of cylindrite are actually coiled sheets that grow as if rolled into pipes. Sometimes the sheets can become uncoiled if put under pressure. Cylindrite is occasionally mined as an ore of lead, tin and the rare element indium, which is used by the microelectronics industry in the manufacture of transistors and silicon chips. However, cylindrite is collected primarily for its very unusual crystal • habit. The majority of the best specimens of cylindrite crystals come from Bolivia - at Poopo in Oruro and at Potosi. Bolivian specimens are found in tin- rich mineralized veins and a re typically associated with similar minerals in the sulphosalt group such as franckeite, incaite, potosiite and tellaite.
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