mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Hardness: 7 on Mohs scale; Color: Milk-white to faint pink; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Milk-white to faint pink
Luster: Vitreous to greasy

Identified June 15, 2026More mineral →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 7 on Mohs scale; Color: Milk-white to faint pink; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Formation & geological history

Formed in hydrothermal veins or as a late-stage crystallization in igneous rocks like pegmatites. The white color is caused by microscopic fluid inclusions trapped during the crystal's growth.

Uses & applications

Used in the manufacture of glass, abrasives, and as a source of silicon for electronics. Also widely used in landscaping and as a common specimen for beginner collectors.

Geological facts

Quartz is one of the most abundant minerals in the Earth's crust. Milky quartz is often found in massive form rather than as distinct individual crystals and frequently occurs alongside gold in hydrothermal veins.

Field identification & locations

Identify in the field by its hardness (it can scratch glass), lack of cleavage, and translucent white color. It is commonly found in gravel pits, mountain streams, and within granite outcrops globally.