This gemstone is called smoky quartz because of its smoky colour.This gemstone come in quartz group which has trigonal crystal system.This beautiful stone has the hardness of 7 on moh scale it is very commonly striated at right angles to c-axis. The natural smoky quartz are found in USA & BRAZIL mainly and also in some parts of Pakistan.
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http://rel” rel=”nofollow”> The natural smoky quartz are found in USA & BRAZIL mainly and also in […….