mineral

Yellow Quartz (Citrine or Citrine-colored Quartz)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Yellow to golden-brown; Luster: Vitreous (glassy); Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

Hardness: 7 on Mohs scale
Color: Yellow to golden-brown
Luster: Vitreous (glassy)

Identified April 7, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Yellow to golden-brown; 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 pegmatites and hydrothermal veins. Often the result of heat-treating amethyst or smoky quartz to achieve a yellow hue, though natural citrine occurs rarely.

Uses & applications

Predominantly used in jewelry (faceting and cabochons), as metaphysical specimens for collectors, and in home decor.

Geological facts

Natural citrine is very rare; most 'citrine' available on the market is actually heat-treated amethyst. When amethyst is heated to around 450-500 degrees Celsius, it turns this characteristic yellow-gold color.

Field identification & locations

Identify in the field by its hardness (it will scratch glass) and lack of cleavage. Look for glassy luster and consistent color. Commonly found in Brazil, Madagascar, and the Ural Mountains of Russia.

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