gemstone
Citrine
Silicon dioxide, SiO2 (quartz variety)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, yellow to brownish-orange color, vitreous luster, trigonal crystal system, and conchoidal fracture.
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Physical properties
Hardness of 7 on the Mohs scale, yellow to brownish-orange color, vitreous luster, trigonal crystal system, and conchoidal fracture.
Formation & geological history
Forms naturally through the hydrothermal growth of quartz or the low-temperature metamorphism of amethyst, though most commercial citrine is heat-treated amethyst.
Uses & applications
Widely used in fine jewelry, rings, pendants, and decorative carvings due to its warm, sunny hue.
Geological facts
Natural citrine is relatively rare compared to heat-treated amethyst, and its yellow color is caused by trace amounts of iron impurities.
Field identification & locations
Identified by its distinct yellow color and lack of cleavage; commonly sourced from Brazil, Madagascar, and the United States.
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