mineral
Yellow Quartz
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, yellow to orange-yellow color due to iron oxide impurities, vitreous (glassy) luster, hexagonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, yellow to orange-yellow color due to iron oxide impurities, vitreous (glassy) luster, hexagonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.
Formation & geological history
Forms in hydrothermal veins, pegmatites, and sedimentary environments where silica-rich solutions precipitate, often colored by iron staining during or after formation.
Uses & applications
Used in jewelry, decorative items, lapidary arts, and spiritual or metaphysical practices.
Geological facts
Quartz is one of the most abundant minerals on Earth's continental crust. When naturally irradiated or heated, certain yellow quartzes can transform into smoky quartz or citrine.
Field identification & locations
Easily identified by its hardness (scratches glass), conchoidal fracture, and lack of cleavage. Found worldwide in nearly all geological environments.
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