mineral

Milky quartz

Quartz (SiO₂), likely massive vein quartz

AI-generated identification · may be incorrect

Hardness 7 Mohs; white to cream with rusty-brown staining, vitreous to waxy luster, and irregular conchoidal fracture. Trigonal crystal structure, no cleavage; specific gravity about 2.65.

Identified October 15, 2026More mineral →

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Physical properties

Hardness 7 Mohs; white to cream with rusty-brown staining, vitreous to waxy luster, and irregular conchoidal fracture. Trigonal crystal structure, no cleavage; specific gravity about 2.65.

Formation & geological history

Likely formed as silica-rich fluids filled fractures and cooled into a quartz vein; iron oxides account for the tan staining. Quartz veins occur in rocks of many ages, so age cannot be determined from the image.

Uses & applications

Quartz is used in glass, ceramics, electronics, and construction; attractive pieces may be polished or collected.

Geological facts

Quartz is one of Earth’s most abundant minerals and resists weathering, often accumulating in stream gravels and soils.

Field identification & locations

The pale, glassy-to-waxy appearance and lack of cleavage are consistent with quartz, but the photo alone cannot confirm the identification. Common worldwide in veins and pegmatites; a scratch test against glass (quartz should scratch it) can help distinguish it.