mineral

Milky quartz (likely iron-stained quartz)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

White to translucent, vitreous-to-waxy luster with irregular fracture and no obvious cleavage; Mohs hardness 7, specific gravity about 2.65. The cream-orange coloration likely comes from iron-oxide staining or surface weathering.

Identified September 1, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids, pegmatites, and igneous veins, and commonly survives weathering as a resistant fragment. The specimen’s precise geological age and locality cannot be determined from the photograph.

Uses & applications

Common quartz is used in glass, ceramics, engineered stone, abrasives, electronics, and industrial silica. Attractive translucent pieces are inexpensive collecting specimens, though this example is not visibly gem grade.

Geological facts

Quartz commonly forms six-sided prisms, but massive or fractured quartz may lack recognizable crystal faces. It should scratch ordinary glass, while a steel nail generally will not scratch it.

Field identification & locations

Look for glassy luster, translucent edges, conchoidal or uneven fracture, and hardness near 7; test cautiously because scratching can damage the specimen. Common worldwide in quartz veins, pegmatites, and metamorphic rocks.