mineral
Quartz (likely milky quartz)
Quartz, silicon dioxide (SiO₂)
AI-generated identification · may be incorrectThe specimen appears massive and cloudy-translucent, with a glassy to dull luster and irregular fracture; crystal faces are not clearly visible. Quartz has Mohs hardness 7, hexagonal crystal structure, no cleavage, and specific gravity about 2.65.
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Physical properties
The specimen appears massive and cloudy-translucent, with a glassy to dull luster and irregular fracture; crystal faces are not clearly visible. Quartz has Mohs hardness 7, hexagonal crystal structure, no cleavage, and specific gravity about 2.65.
Formation & geological history
Quartz forms in igneous and metamorphic rocks and in mineral veins from silica-rich fluids. Its age cannot be determined from the photograph.
Uses & applications
Commonly used in glassmaking, electronics, and abrasives; attractive pieces are collected or used decoratively.
Geological facts
Milky appearance comes from light scattering by microscopic fluid inclusions and imperfections.
Field identification & locations
The pale, translucent mass and uneven fracture are consistent with quartz, but the image alone cannot rule out other translucent minerals. Quartz is widespread, including in the geological region around Tehran; value is usually about $5–$30 for a common specimen, depending on size and appearance.
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