mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

White to translucent, vitreous to dull luster, and uneven fracture; hardness 7 Mohs, specific gravity about 2.65, with no cleavage. The specimen appears massive rather than showing distinct crystals.

Identified September 28, 2026More mineral →

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Physical properties

White to translucent, vitreous to dull luster, and uneven fracture; hardness 7 Mohs, specific gravity about 2.65, with no cleavage. The specimen appears massive rather than showing distinct crystals.

Formation & geological history

Forms when silica-rich fluids crystallize in veins or cavities, and also occurs in igneous and metamorphic rocks. Quartz is widespread across geological ages; the specimen’s exact age and locality cannot be determined from the image.

Uses & applications

Used as a decorative and collectible stone; quartz is also important in glassmaking, abrasives, and electronics, though this rough piece is not suitable for precision applications.

Geological facts

Milky appearance comes from microscopic fluid or gas inclusions that scatter light.

Field identification & locations

Common in quartz veins and many rock types worldwide. Identify it by its glassy look, lack of cleavage, and ability to scratch ordinary glass; visual identification alone is not definitive.