mineral
Citrine Geode Fragment
Silicon Dioxide (SiO2) with iron impurities
Hardness: 7 on Mohs scale; Color: Yellow, brownish-orange, or amber; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Yellow, brownish-orange, or amber
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7 on Mohs scale; Color: Yellow, brownish-orange, or amber; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65
Formation & geological history
Formed in volcanic cavities or sedimentary geodes where silica-rich fluids crystallized. Much commercial citrine is produced by heat-treating amethyst or smoky quartz to alter its oxidation state.
Uses & applications
Primarily used in jewelry, as a healing crystal in metaphysical practices, and as a decorative display mineral for collectors.
Geological facts
Citrine is known as the 'Success Stone' or 'Merchant's Stone' in folklore. Natural citrine is actually quite rare compared to heat-treated varieties, which often have a more reddish or opaque white base than natural specimens.
Field identification & locations
Identify by its hexagonal crystal points, yellow to orange hue, and lack of visible cleavage. In the field, look for quartz geodes in basaltic or sedimentary regions. Common locations include Brazil, Madagascar, and Russia.
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