mineral
Tumbled Yellow Quartz
Quartz (Silicon Dioxide, SiO2)
Hardness of 7 on the Mohs scale, yellow to golden-brown color, vitreous to waxy luster when tumbled, trigonal crystal system, conchoidal fracture, specific gravity of 2.65
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Physical properties
Hardness of 7 on the Mohs scale, yellow to golden-brown color, vitreous to waxy luster when tumbled, trigonal crystal system, conchoidal fracture, specific gravity of 2.65
Formation & geological history
Formed in hydrothermal veins and pegmatites, often found in alluvial deposits where it is worn smooth by water action before tumbling
Uses & applications
Used for tumbling, ornamental decoration, jewelry making, and metaphysical purposes
Geological facts
Quartz is one of the most abundant minerals on Earth and is piezoelectric, meaning it can generate an electrical charge under mechanical stress
Field identification & locations
Can be identified in the field by its hardness (scratches glass), lack of cleavage, and distinct conchoidal fracture; commonly found in stream beds and gravel deposits worldwide
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