Smoky Quartz
Smoky quartz colours range from a light brown to a deep brown. The colour is caused by heating, either natural or artificial. Most commerical smoky quartz is artifically-irradiated rock crystal. Hardness: 7 (Mohs).
Smoky quartz colours range from a light brown to a deep brown. The colour is caused by heating, either natural or artificial. Most commerical smoky quartz is artifically-irradiated rock crystal. Hardness: 7 (Mohs).