mineral

Quartz-rich rock, likely milky quartz or quartzite

Quartz (SiO₂), possibly in a quartzite or hydrothermal vein matrix

AI-generated identification · may be incorrect

Translucent gray-beige to pale brown, vitreous-to-waxy luster, irregular fracture, and no obvious cleavage; quartz hardness is Mohs 7, with specific gravity about 2.65. The granular, sparkly texture suggests intergrown quartz crystals, possibly with iron-oxide staining or minor feldspar/mica.

Identified September 16, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed when silica-rich fluids crystallized in a fracture, or when quartz-rich sandstone recrystallized during metamorphism. Exact age and origin cannot be determined from the photograph alone.

Uses & applications

Quartz is used in glass, ceramics, electronics, abrasives, and engineered stone; attractive pieces may be collected or cut for display, though this specimen appears more suitable as a cabinet specimen than jewelry material.

Geological facts

Quartz commonly shows conchoidal fracture and can scratch ordinary glass. Brown or golden coloration commonly results from iron oxides coating or staining the quartz.

Field identification & locations

Test with a steel knife and glass: quartz should resist the knife and scratch glass, though surface coatings can confuse results. Common sources include hydrothermal veins and quartzite terrains worldwide.