Smoky Quartz
Smoky quartz colours range from a light brown to a deep brown. The colour is caused by heat, which is achieved either naturally or artificially. Most commercial smoky quartz is artificially-irradiated rock crystal. Hardness: 7 (Mohs).
Smoky quartz colours range from a light brown to a deep brown. The colour is caused by heat, which is achieved either naturally or artificially. Most commercial smoky quartz is artificially-irradiated rock crystal. Hardness: 7 (Mohs).
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