mineral

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: White to cream with orange/brown iron staining; Luster: Vitreous to waxy; Crystal Structure: Trigonal; Cleavage: None (conchoidal fracture)

Hardness: 7 on Mohs scale
Color: White to cream with orange/brown iron staining
Luster: Vitreous to waxy

Identified July 5, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: White to cream with orange/brown iron staining; Luster: Vitreous to waxy; Crystal Structure: Trigonal; Cleavage: None (conchoidal fracture)

Formation & geological history

Formed in hydrothermal veins or as a primary constituent of igneous rocks like granite. The white color is caused by microscopic fluid inclusions trapped during crystal growth, while the orange tints are from iron oxide (limonite or hematite) leaching into fractures.

Uses & applications

Used widely in decorative landscaping, as tumbled stones for healing or collecting, and industrially as a source of silica for glass and electronics.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is often found in massive form rather than distinct crystals when it cools rapidly in large veins.

Field identification & locations

Identify by its hardness (it will scratch glass), lack of cleavage, and common occurrence in riverbeds or mountain trails. This specimen appears water-worn or tumbled.