mineral

Citrine Geode

Citrine (Silicon Dioxide, SiO2)

Hardness: 7 on Mohs scale; Color: Pale yellow to brownish-orange; Luster: Vitreous; Crystal structure: Trigonal/Hexagonal; Cleavage: None; Specific gravity: 2.65

Hardness: 7 on Mohs scale
Color: Pale yellow to brownish-orange
Luster: Vitreous

Identified May 13, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Pale yellow to brownish-orange; Luster: Vitreous; Crystal structure: Trigonal/Hexagonal; Cleavage: None; Specific gravity: 2.65

Formation & geological history

Formed when amethyst or smoky quartz is naturally heated by geothermal activity, or more commonly via hydrothermal deposition in volcanic cavities (geodes). Many commercial specimens are heat-treated amethyst.

Uses & applications

Primarily used for ornamental purposes, healing crystal collections, jewelry, and as a decorative specimen for home interiors.

Geological facts

Natural citrine is quite rare; most 'citrine' in the market is actually heat-treated amethyst. It is known as the 'Success Stone' or 'Merchant's Stone' in folklore.

Field identification & locations

Identified by its yellow-to-orange hue and lack of cleavage. In the field, look for hollow, round nodules (geodes) in volcanic or sedimentary rocks. Natural citrine is found in Brazil, Madagascar, and Spain.