gemstone
Citrine
Silicon dioxide (Quartz variety, SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, yellow to orange-brown color, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage.
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Physical properties
Hardness of 7 on the Mohs scale, yellow to orange-brown color, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage.
Formation & geological history
Forms in pegmatites, hydrothermal veins, and by the thermal alteration of amethyst, typically in metamorphic or igneous environments.
Uses & applications
Widely used as a popular yellow gemstone in rings, pendants, and other jewelry pieces.
Geological facts
Natural citrine is relatively rare; most commercial citrine is produced by heat-treating low-grade amethyst or smoky quartz.
Field identification & locations
Identified by its distinctive yellow to brownish-orange color and quartz hardness, commonly sourced from Brazil, Madagascar, and Russia.
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