mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Hardness: 7 on Mohs scale. Color: White to creamy white due to microscopic fluid inclusions. Luster: Vitreous (glassy) to greasy. Crystal structure: Hexagonal/Trigonal. Cleavage: None (conchoidal fracture). Specific gravity: 2.65.

Hardness: 7 on Mohs scale
Color: White to creamy white due to microscopic fluid inclusions
Luster: Vitreous (glassy) to greasy

Identified June 30, 2026More mineral →

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Physical properties

Formation & geological history

Formed through hydrothermal processes where silica-rich fluids cool in veins or cavities. It can also form during the crystallization of igneous rocks or through metamorphism. It is found in geological settings ranging from Precambrian to recent times.

Uses & applications

Used in the production of glass, ceramics, and abrasives. High-purity quartz is used in electronics and solar panels. Lower quality specimens are used for landscaping, construction aggregate, and as decorative pocket stones.

Geological facts

Milky quartz is the most common variety of crystalline quartz. Its white color is caused by tiny bubbles of gas or liquid trapped during the crystal's growth. It is often found as the 'vein mineral' that hosts gold deposits.

Field identification & locations

Identify in the field by its hardness (it will scratch glass), lack of cleavage, and white opaque appearance. Look for it in areas with high tectonic activity or exposed igneous intrusions. Tips for collectors: Check for associated minerals like pyrite or tourmaline.