mineral

Milky quartz

Quartz (SiO₂), likely massive milky quartz

AI-generated identification · may be incorrect

White to translucent, vitreous-to-waxy luster with irregular fracture and no obvious cleavage; Mohs hardness 7 and specific gravity about 2.65. The faint peach tint may reflect iron staining or inclusions.

Identified August 25, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich hydrothermal fluids fill fractures and cavities, or crystallizes in pegmatites and veins; specimens may range from Precambrian to modern geological settings. This appears to be a naturally weathered or broken piece rather than a distinct rock type.

Uses & applications

Common quartz is used in glass, ceramics, engineered stone, abrasives, and electronics; attractive pieces are sold as inexpensive mineral specimens or used in lapidary work. It is generally not jewelry-grade unless transparent and well-formed.

Geological facts

Milky appearance results from microscopic fluid inclusions, fractures, or mineral inclusions scattering light. Quartz is one of Earth’s most abundant minerals and has a distinctive hardness that can scratch ordinary glass.

Field identification & locations

Identify it by its white translucency, glassy sheen, lack of cleavage, and ability to scratch glass or steel; avoid confusing it with calcite, which is softer and commonly shows cleavage. Common worldwide in quartz veins, pegmatites, and igneous terrains.