mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Hardness of 7 on the Mohs scale; yellow to golden-brown color; vitreous luster; trigonal crystal system; conchoidal fracture with no true cleavage; specific gravity of 2.65.

Identified July 30, 2026More mineral →

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Physical properties

Hardness of 7 on the Mohs scale; yellow to golden-brown color; vitreous luster; trigonal crystal system; conchoidal fracture with no true cleavage; specific gravity of 2.65.

Formation & geological history

Forms in igneous, metamorphic, and sedimentary environments. Typically crystallizes from silica-rich hydrothermal solutions or magmas over millions of years.

Uses & applications

Used in jewelry, decorative carvings, spiritual and metaphysical practices, and as mineral specimens for collectors.

Geological facts

Quartz is one of the most abundant minerals in the Earth's continental crust. The yellow color in quartz is often caused by irradiation, trace amounts of iron impurities, or sub-microscopic inclusions.

Field identification & locations

Can be identified by its high hardness (scratches glass), conchoidal fracture, and lack of cleavage. Commonly found in pegmatites, hydrothermal veins, and alluvial gravel deposits worldwide.