igneous
Quartz Vein Rock
Silicon dioxide embedded in host rock (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, earthy brown exterior with a white crystalline quartz inclusion, vitreous luster on the quartz portion, conchoidal fracture.
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Physical properties
Hardness of 7 on the Mohs scale, earthy brown exterior with a white crystalline quartz inclusion, vitreous luster on the quartz portion, conchoidal fracture.
Formation & geological history
Formed when hydrothermal fluids rich in silica precipitated quartz into fractures within older host rock under high pressure and temperature.
Uses & applications
Used primarily as decorative landscape stones, in lapidary work, and as mineral specimens for rock collections.
Geological facts
Quartz veins are the primary geological source for hydrothermal gold deposits and native metal veins worldwide.
Field identification & locations
Easily identified in the field by the stark white, glassy quartz contrasting against weathered, darker host rock; common in mountainous or previously active tectonic regions.
