mineral

Milky Quartz / Quartz Geode Fragment

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale. Color: Translucent white to milky off-white. Luster: Vitreous to sugary/sparkly. Crystal Structure: Trigonal/Hexagonal with microcrystalline druzy surface. Cleavage: None (conchoidal fracture). Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Translucent white to milky off-white
Luster: Vitreous to sugary/sparkly

Identified July 24, 2026More mineral →

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Physical properties

Formation & geological history

Forms through hydrothermal processes as silica-rich fluid precipitates within cavities of host rocks, such as volcanic basalt or sedimentary limestone, leaving druzy quartz crystals lined inside geodes.

Uses & applications

Used as decorative specimens, in lapidary art, as metaphysical crystals, and industrially for electronics, glassmaking, and abrasive production.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Druzy quartz features thousands of tiny, glittering crystal faces that catch the light like sugar crystals.

Field identification & locations

Identify in the field by its hardness (scratches glass), glass-like to sugary sparkle, lack of cleavage, and resistance to acid. Frequently found in stream beds, gravel deposits, and geode-bearing volcanic formations worldwide.

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