mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

White to translucent, vitreous to slightly dull luster; Mohs hardness 7, no cleavage, conchoidal fracture, and hexagonal crystal structure. The specimen appears massive and rough, with possible dirt or weathering on one edge.

Identified September 30, 2026More mineral →

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Physical properties

Formation & geological history

Typically crystallizes from silica-rich fluids in veins and pegmatites, or occurs as resistant grains in sediments. Quartz formed across many geological ages; the image alone cannot establish its age or exact origin.

Uses & applications

Used as a silica source in glassmaking and industrial materials; attractive pieces are collected or used decoratively.

Geological facts

Quartz is among Earth’s most abundant minerals and can persist through extensive weathering because it is relatively hard and chemically durable.

Field identification & locations

Identify by its glassy appearance, hardness (it can scratch ordinary glass), and lack of cleavage; common in quartz veins and many igneous, metamorphic, and sedimentary settings worldwide. This small, uncrystallized piece has modest specimen value.