mineral

Milky quartz (likely quartz-rich rock)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Typically Mohs hardness 7, white to translucent with a vitreous-to-waxy luster, hexagonal crystal structure, and no cleavage; conchoidal fracture. The specimen appears massive and weathered, with possible minor feldspar or alteration.

Identified September 5, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich igneous or hydrothermal fluids and commonly occurs in veins, pegmatites, and metamorphic rocks. Its exact age and host formation cannot be determined from the image.

Uses & applications

Used for glass, engineered stone, ceramics, abrasives, and electronics; attractive translucent pieces are collected or used ornamentally. This rough specimen has limited gem value.

Geological facts

Milky appearance results from microscopic fluid inclusions, fractures, or impurities scattering light. Quartz is one of Earth’s most abundant and durable minerals.

Field identification & locations

Identify by its glassy appearance, hardness, lack of cleavage, and inability to scratch it with a steel knife while it can scratch ordinary glass. Common worldwide, especially in quartz veins and granite-rich regions.