mineral

Quartz with Tourmaline and Iron Staining

Silicon Dioxide (SiO2) with accessory tourmaline and limonite

AI-generated identification · may be incorrect

Hardness of 7 on the Mohs scale, clear to milky white with dark/black crystalline inclusions and orange-brown iron oxide staining, vitreous luster, conchoidal fracture, specific gravity of 2.65

Identified July 29, 2026More mineral →

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Physical properties

Hardness of 7 on the Mohs scale, clear to milky white with dark/black crystalline inclusions and orange-brown iron oxide staining, vitreous luster, conchoidal fracture, specific gravity of 2.65

Formation & geological history

Formed in hydrothermal veins and pegmatites, where hot mineral-rich fluids cool and crystallize within fractures of host rocks over millions of years

Uses & applications

Collected by rockhounds, used in lapidary arts, and appreciated as a mineral specimen

Geological facts

Quartz is one of the most abundant minerals in the Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electrical charge under mechanical stress

Field identification & locations

Identified by its high hardness (scratches glass), lack of cleavage, and conchoidal fracture; commonly found globally in pegmatites, quartz veins, and alluvial gravels