mineral
Yellow Quartz / Citrine Quartz
Silicon Dioxide (SiO2)
Hardness: 7 (Mohs scale), Color: Pale yellow to brownish-orange, Luster: Vitreous/Glassy, Crystal Structure: Trigonal/Hexagonal, Cleavage: None (Conchoidal fracture), Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: Pale yellow to brownish-orange, Luster: Vitreous/Glassy, Crystal Structure: Trigonal/Hexagonal, Cleavage: None (Conchoidal fracture), Specific Gravity: 2.65
Formation & geological history
Formed in igneous and metamorphic rocks, particularly in hydrothermal veins and pegmatites. The yellow color is typically caused by iron impurities or natural irradiation during formation.
Uses & applications
Used widely in the jewelry industry as a semi-precious gemstone. Also popular as a decorative 'healing stone' in metaphysical collection and interior design.
Geological facts
Natural citrine is quite rare; most commercial citrine is actually heat-treated amethyst or smoky quartz. The name comes from the French word 'citron', meaning lemon.
Field identification & locations
Identify in the field by its hardness (will scratch glass) and lack of cleavage. Look for characteristic greasy or vitreous luster on wet specimens found in riverbeds or gravel pits.
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Mineral
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Mineral/Rock
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