mineral
Quartz (Yellow / Citrine Pebble)
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, yellow to yellowish-brown color, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65
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Physical properties
Hardness of 7 on the Mohs scale, yellow to yellowish-brown color, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65
Formation & geological history
Formed through the cooling and crystallization of silica-rich hydrothermal solutions or magma, commonly found as water-worn pebbles in stream beds, beaches, and alluvial deposits due to its high resistance to weathering.
Uses & applications
Used in decorative landscaping, tumbled stones, jewelry, gemstone carving, and mineral collections.
Geological facts
Quartz is one of the most abundant minerals in Earth's continental crust. Yellow coloration in natural quartz is frequently caused by trace amounts of iron or natural irradiation.
Field identification & locations
Easily identified by its hardness (scratches glass), conchoidal fracture, and lack of cleavage. Common in riverbeds and gravel bars worldwide.
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