mineral

Yellow Quartz (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Pale yellow to golden brown; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Pale yellow to golden brown
Luster: Vitreous (glassy)

Identified March 28, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Pale yellow to golden brown; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed in igneous (pegmatites) or metamorphic environments through crystallization of silica-rich hydrothermal fluids. Yellow coloration often results from trace iron impurities or natural irradiation during the geological aging process.

Uses & applications

Commonly used in jewelry (as a birthstone), crystal healing practices, decorative carvings, and as a popular collector specimen due to its durability and color.

Geological facts

Naturally occurring citrine is quite rare; most commercial 'citrine' is actually heat-treated amethyst or smoky quartz. It is known as the 'Success Stone' in folklore.

Field identification & locations

Identify by its ability to scratch glass and lack of cleavage. Tumbled specimens like this one are commonly found in riverbeds or sourced globally from Brazil, Madagascar, and Russia. Look for internal fractures and cloudiness as signs of authenticity.