sedimentary
Quartz (Jasper / Chert)
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, waxy to vitreous luster, conchoidal fracture, various shades of brown and tan, microcrystalline crystal structure.
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Physical properties
Hardness of 7 on the Mohs scale, waxy to vitreous luster, conchoidal fracture, various shades of brown and tan, microcrystalline crystal structure.
Formation & geological history
Formed through the precipitation of silica from aqueous solutions or accumulation of siliceous oozes, often in sedimentary environments over millions of years.
Uses & applications
Used for decorative items, lapidary work, tumbling, and as a collector's specimen.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and is exceptionally resistant to weathering.
Field identification & locations
Can be identified in the field by its high hardness (scratches glass), conchoidal fracture, and lack of cleavage. Commonly found in riverbeds and sedimentary deposits.
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