mineral

Likely milky quartz, possibly quartz-rich vein rock

Quartz (SiO₂); identification from the image is uncertain

AI-generated identification · may be incorrect

White to pale gray, opaque and granular with a vitreous-to-dull luster; quartz has Mohs hardness 7, trigonal crystals, no cleavage, and conchoidal fracture. The specimen appears rough and crystalline, but the image does not show diagnostic tests or clear crystal faces.

Identified September 23, 2026More mineral →

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Physical properties

Formation & geological history

If quartz-rich, it likely formed when silica-bearing fluids filled fractures and crystallized; such veins occur in rocks of many geological ages. The specimen’s exact formation and age cannot be determined visually.

Uses & applications

Quartz is used in glass, electronics, and as a gemstone or collectible; quartz-rich rock may also be used as aggregate or ornamental material.

Geological facts

Quartz is one of Earth’s most abundant minerals and is composed of silicon and oxygen.

Field identification & locations

Look for hardness sufficient to scratch glass, lack of cleavage, and irregular fracture; similar pale rocks such as feldspar-rich material can be difficult to distinguish without testing. Quartz occurs worldwide in veins and many rock types.