Mineral in Metamorphic/Igneous Host
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
Hardness of 7 on Mohs scale (quartz), white to translucent color with iron staining (rust-red), vitreous luster, trigonal crystal system; often found as massive or crystalline crusts within a darker, fine-grained host rock.
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Physical properties
Hardness of 7 on Mohs scale (quartz), white to translucent color with iron staining (rust-red), vitreous luster, trigonal crystal system; often found as massive or crystalline crusts within a darker, fine-grained host rock.
Formation & geological history
Formed through hydrothermal processes where silica-rich hot fluids circulate through fractures in crustal rocks. As the fluids cool, quartz precipitates out. The age of such veins can range from millions to billions of years depending on the regional tectonic history.
Uses & applications
Quartz has widespread industrial use in electronics (piezoelectric properties), glassmaking, and jewelry. Small high-quality specimens are collected for educational or aesthetic purposes.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. The reddish-brown staining visible on this specimen is likely Limonite or Hematite, which are iron oxides that frequently coat minerals in high-oxygen environments.
Field identification & locations
Identify in the field by its hardness (it will scratch glass and steel knives) and lack of cleavage (it breaks with a conchoidal fracture). It is ubiquitous worldwide, especially in mountain belts and mining districts.
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