mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Hardness: 7 on Mohs scale. Color: White to translucent. Luster: Vitreous (glassy) to greasy. Crystal System: Trigonal. Cleavage: Indistinct/Conchoidal fracture. Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: White to translucent
Luster: Vitreous (glassy) to greasy

Identified April 8, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale. Color: White to translucent. Luster: Vitreous (glassy) to greasy. Crystal System: Trigonal. Cleavage: Indistinct/Conchoidal fracture. Specific Gravity: 2.65.

Formation & geological history

Formed from the crystallization of silica-rich hydrothermal veins or as a primary constituent in igneous rocks like granite and pegmatites. The white 'milky' color is caused by microscopic fluid inclusions trapped during crystal growth.

Uses & applications

Used in the production of glass, ceramics, and abrasives. High-purity quartz is used in electronics for its piezoelectric properties. Often used as decorative garden stone or for lapidary work.

Geological facts

Quartz is one of the most abundant minerals in Earth's crust. Milky quartz specifically can contain minute traces of gold in certain geological environments, making it an indicator mineral for prospectors.

Field identification & locations

Identify by its ability to scratch glass, lack of reaction to acid, and lack of distinct cleavage planes (it breaks like glass). Common worldwide, especially in mountain ranges and riverbeds.