mineral with metamorphic or igneous host

Quartz Vein in Host Rock (often Granite or Schist)

Silicon Dioxide (SiO2) within host matrix

Hardness: 7 (Quartz), Color: White to milky white milky quartz, Luster: Vitreous to waxy, Crystal Structure: Hexagonal (trigonal), Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Identified June 30, 2026More mineral with metamorphic or igneous host →

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Physical properties

Hardness: 7 (Quartz), Color: White to milky white milky quartz, Luster: Vitreous to waxy, Crystal Structure: Hexagonal (trigonal), Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Formation & geological history

Formed through hydrothermal processes where hot, mineral-rich fluids circulate through fractures in crustal rocks, depositing quartz as they cool. This can occur in various geological ages from Precambrian to Cenozoic.

Uses & applications

Quartz is used in glass making, electronics (piezoelectric properties), abrasives, and as a gemstone or collector specimen. The host rock may be used as construction aggregate.

Geological facts

Quartz veins are often primary targets for gold prospectors, as gold is frequently found associated with these hydrothermal quartz deposits. This specific specimen shows 'veining' where the mineral filled an existing crack.

Field identification & locations

Identify by its hardness (scratches glass), white color against a darker matrix, and lack of cleavage. Common in mountain ranges and metamorphic terrains worldwide.

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Quartz Vein in Host Rock

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