mineral

Quartz (Yellow/Citrine variety)

Crystalline Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Pale yellow to golden brown; Luster: Vitreous/glassy; Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct/Conchoidal fracture; Specific gravity: 2.65.

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

Identified April 30, 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: Indistinct/Conchoidal fracture; Specific gravity: 2.65.

Formation & geological history

Formed in igneous and metamorphic rocks, as well as in hydrothermal veins. Yellow varieties often occur when amethyst or smoky quartz is naturally heated by geothermal activity.

Uses & applications

Used in jewelry, crystal healing, watch making (piezoelectric properties), and glass manufacturing.

Geological facts

Natural yellow citrine is relatively rare; most commercial citrine is actually heat-treated amethyst. It is known as the 'Success Stone' in folklore.

Field identification & locations

Identify by its hardness (will scratch glass), lack of cleavage, and translucent yellow color. Commonly found in Brazil, Madagascar, and Russia.

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sedimentary

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Mineral/Rock

Banded Gneiss (River Rock/Pebble)

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Metamorphic Rock

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mineral