mineral

Quartz vein in host rock

Quartz (SiO₂), with possible feldspar or carbonate-bearing matrix

AI-generated identification · may be incorrect

White to cream, coarse crystalline clusters with a vitreous-to-dull luster; quartz has Mohs hardness 7, trigonal crystal structure, no cleavage, and specific gravity about 2.65. The surrounding gray-brown material appears to be attached host rock.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed when silica-rich fluids filled fractures and crystallized as a hydrothermal vein; the specimen’s age and exact host rock cannot be determined from the image.

Uses & applications

Quartz is used in glass, electronics, abrasives, and decorative stone; attractive clusters are kept as cabinet or mineral specimens.

Geological facts

Quartz is one of Earth’s most abundant minerals and commonly forms veins cutting older rocks.

Field identification & locations

Look for hard, glassy white crystals that scratch glass and lack cleavage; quartz veins occur in many igneous, metamorphic, and sedimentary terrains. The image does not show enough detail to identify the matrix confidently.