mineral
Smoky Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness of 7, vitreous luster, conchoidal fracture, and brownish-grey to dark brown color caused by natural irradiation.
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Physical properties
Mohs hardness of 7, vitreous luster, conchoidal fracture, and brownish-grey to dark brown color caused by natural irradiation.
Formation & geological history
Forms in igneous, metamorphic, and pegmatitic environments through the irradiation of surrounding aluminum-bearing quartz.
Uses & applications
Widely used in jewelry, ornamental carvings, and as a popular mineral specimen for collectors.
Geological facts
Smoky quartz is the national gemstone of Scotland and often darkens naturally over millions of years due to exposure to radioactive rocks.
Field identification & locations
Identified by its distinct brown coloration and conchoidal fracture; commonly found globally with major deposits in Brazil and the US.
