mineral

Milky Quartz (with trace inclusions)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Milky white to translucent with grey and orange-brown inclusions; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Luster: Vitreous to greasy

Identified February 28, 2026More mineral →

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Physical properties

Formation & geological history

Formed from the cooling of silica-rich hydrothermal fluids or magma. This specimen appears water-worn, likely sourced from a riverbed or glacial till, originating from the crystallization of magma in veins within other rock types.

Uses & applications

Used in the production of glass, ceramics, and abrasives. In many cultures, it is used for lapidary work, jewelry, and as a 'healing stone' in metaphysical practices. High-purity quartz is also essential for electronics and semiconductors.

Geological facts

Milky quartz gets its cloudy appearance from tiny fluid inclusions of gas or liquid trapped during the crystal's growth. It is one of the most abundant minerals in the Earth's continental crust.

Field identification & locations

Identify in the field by its hardness (it will scratch glass) and lack of cleavage. Look for it in gravel pits, stream beds, or as veins in igneous and metamorphic rocks. It often has a 'waxy' appearance when tumbled.

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