mineral

Quartz (Yellow/Milky variety)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Creamy white to pale yellow; Luster: Vitreous to waxy; Structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Creamy white to pale yellow
Luster: Vitreous to waxy

Identified April 13, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Creamy white to pale yellow; Luster: Vitreous to waxy; Structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed through the cooling of silica-rich magma or from hydrothermal veins. This specimen appears water-worn (tumbled), suggesting it was collected from a riverbed, beach, or alluvial deposit.

Uses & applications

Common quartz is used in glassmaking, abrasives, and as jewelry (when high quality). This specific pebble-sized specimen is mostly for collecting or metaphysical use.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Its yellow tint is usually caused by trace impurities of iron or through natural irradiation.

Field identification & locations

Identify in the field by its inability to be scratched by a steel knife (7 hardness) and its lack of visible cleavage planes. It is ubiquitous in most geological environments worldwide.

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