mineral

Quartz-rich rock, possibly milky quartz with chlorite or epidote

Quartz (SiO₂), with unidentified green inclusions

AI-generated identification · may be incorrect

Typically hardness 7 Mohs, white to translucent, with a vitreous-to-waxy luster and no cleavage; the green-gray material may be chlorite, epidote, or altered minerals. The specimen appears naturally weathered or rounded, but its exact identity cannot be confirmed from one photograph.

Identified September 10, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed in a hydrothermal vein or metamorphic setting when silica-rich fluids crystallized quartz, later incorporating green alteration minerals. Such veins may range from Precambrian to younger geologic ages.

Uses & applications

Quartz is used in glass, ceramics, electronics, abrasives, and decorative specimens; attractive pieces may be polished or collected. This example appears primarily of modest lapidary or educational interest.

Geological facts

Milky quartz becomes opaque because of microscopic fluid inclusions and structural defects; green inclusions can strongly affect its color and pattern.

Field identification & locations

Common in quartz veins, pegmatites, and metamorphic terrains worldwide. Check for glassy fracture, hardness greater than steel, and lack of reaction to dilute acid; a streak, specific-gravity test, or close inspection is needed to identify the inclusions.