Cassiterite In Quartz Tumbled Stones lapfa-request1 transformed

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Cassiterite In Quartz Tumbled Stones lapfa-request1 transformedCassiterite In Quartz Tumbled Stones Cassiterite is a black mineral composed of tin oxide (SnO2); although very rare yellow ish translucent gemstone quality of cassiterite also occurs. Another name for Cassiterite is Tinstone, as it is an important tin ore. These specimens contain cassiterite in a matrix of quartz, some may also contain orange stains that may be iron ore or hematite inclusions.