mineral

Quartz in Matrix (possibly Basalt or Siltstone host)

Silicon Dioxide (SiO2) in Host Rock

AI-generated identification · may be incorrect

Quartz: Hardness 7 (Mohs scale), milky white to translucent color, vitreous luster, hexagonal crystal system (though massive/microcrystalline here), conchoidal fracture. Host rock: Dull luster, fine-grained, grey-green color.

Identified April 1, 2026More mineral →

Explore Quartz in Matrix (possibly Basalt or Siltstone host) in the encyclopedia →

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Physical properties

Formation & geological history

Formed through hydrothermal processes where mineral-rich hot water circulated through cracks (veins) in existing host rock, precipitating quartz as it cooled. This specific specimen shows a contact zone between a quartz vein and the surrounding rock.

Uses & applications

Quartz is used in glassmaking, electronics (piezoelectric properties), abrasives, and as semi-precious gemstones. This specific raw specimen is primarily for amateur collecting or decorative use.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Vein quartz like this often serves as a primary indicator for gold prospectors, as gold is frequently found within these hydrothermal systems.

Field identification & locations

Identify by its ability to scratch glass (Hardness 7) and its lack of cleavage. Look for the sharp contrast between the light mineral and the darker, fine-grained host material. Commonly found in stream beds and mountainous regions where erosion has exposed old mineral veins.