mineral

Quartz (Tumbled)

Silicon Dioxide (SiO2)

Hardness of 7 on the Mohs scale, typically colorless or pale yellow, vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.

Identified August 2, 2026More mineral →

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Physical properties

Hardness of 7 on the Mohs scale, typically colorless or pale yellow, vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.

Formation & geological history

Forms in a wide variety of geological environments, most notably in igneous, metamorphic, and sedimentary rocks. It crystallizes from silica-rich hydrothermal solutions and magmas.

Uses & applications

Widely used in jewelry, as decorative tumbled stones, in electronics, and in glass manufacturing.

Geological facts

Quartz is one of the most abundant minerals in the Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electrical charge under mechanical stress.

Field identification & locations

Easily identified by its high hardness (scratches glass), conchoidal fracture, and lack of cleavage. Commonly found in riverbeds, beaches, and mineral deposits worldwide.