mineral

Milky quartz vein fragment

Quartz (silicon dioxide, SiO₂), massive/microcrystalline variety

AI-generated identification · may be incorrect

Whitish to gray, translucent edges, vitreous-to-waxy luster, irregular conchoidal fracture, and no obvious cleavage; Mohs hardness 7, specific gravity about 2.65. The layered, rusty surface may reflect weathering or iron-oxide staining and does not show clear crystal faces.

Identified August 10, 2026More mineral →

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Physical properties

Formation & geological history

Likely quartz precipitated from silica-rich hydrothermal fluids in a fracture, later exposed and weathered. Quartz veins occur in many Paleozoic–Mesozoic mountain belts; the photograph alone cannot establish a precise age.

Uses & applications

Common quartz is used in glass, ceramics, engineered stone, abrasives, and electronics; attractive translucent pieces are collected or used decoratively. This fragment appears ordinary rather than gem-grade.

Geological facts

Milky quartz gets its cloudiness from microscopic fluid inclusions and/or structural defects. It can resemble white calcite, but quartz is harder and does not effervesce with dilute acid.

Field identification & locations

Consistent with quartz-bearing metamorphic or igneous terrains around northwestern Iran, including the broader 37.5°N, 45.1°E region, though locality confirmation requires matrix and testing. Check for scratches on glass (quartz scratches it), acid reaction, and a fresh conchoidal fracture; associated feldspar or mica would support a vein/pegmatite setting.