mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: White to cream/yellowish (stained by iron oxides); Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: White to cream/yellowish (stained by iron oxides)
Luster: Vitreous to greasy

Identified June 5, 2026More mineral →

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Physical properties

Formation & geological history

Formed from the crystallization of silica-rich hydrothermal fluids in veins or as a late-stage mineral in igneous pegmatites. It is one of the most common minerals found in the Earth's crust across all geological ages.

Uses & applications

Used in the production of glass, ceramics, and abrasives. Massive varieties like this are frequently used for landscaping, garden decoration, and as a source of silicon for electronic components.

Geological facts

The milky white color is caused by millions of tiny fluid inclusions (gas or liquid bubbles) trapped during the crystal's growth. It is often found as the 'vein' material that miners follow to find gold.

Field identification & locations

Identify in the field by its hardness (will scratch glass), lack of cleavage, and common occurrence in veins. It is ubiquitous worldwide, especially in mountainous regions and riverbeds.