Milky Quartz

Physical Properties

Hardness: 7 on Mohs scale; Color: White to translucent; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (Conchoidal fracture); Specific Gravity: 2.65

Formation & Geological History

Forms in igneous, metamorphic, and sedimentary environments. Most commonly found in hydrothermal veins and pegmatites. The milky color is caused by tiny gas or liquid bubbles trapped during crystal growth.

Uses & Applications

Used in glass manufacturing, electronics (due to piezoelectric properties), construction aggregates, as an abrasive, and frequently in jewelry or as home decor/healing crystals.

Geological Facts

Milky quartz is the most common variety of crystalline quartz. It is responsible for the white 'veins' often seen cutting through darker rocks in mountain ranges.

Field Identification & Locations

Identify in the field by its hardness (it will scratch glass), lack of cleavage, and typical white 'waxy' appearance. Found globally in almost any geological setting.

Identified on: 4/27/2026

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