mineral
Citrine (tumbled)
Silicon dioxide, SiO2
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, yellow to brownish-orange color, vitreous luster, trigonal crystal system, no cleavage, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, yellow to brownish-orange color, vitreous luster, trigonal crystal system, no cleavage, specific gravity of 2.65.
Formation & geological history
Forms in igneous rocks, specifically pegmatites, and hydrothermal veins. Much commercial citrine is heat-treated amethyst.
Uses & applications
Primarily used in jewelry and for collecting.
Geological facts
Natural citrine is relatively rare; most on the market is heat-treated amethyst or smoky quartz.
Field identification & locations
Identify by its hardness (scratches glass) and distinctive yellow-orange color. Commonly found in Brazil, Madagascar, and Russia.
