mineral

Yellow Quartz (Citrine-colored Quartz)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale. Color: Pale yellow to deep amber. Luster: Vitreous (glassy). Crystal Structure: Trigonal/Hexagonal. Cleavage: None (conchoidal fracture). Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Pale yellow to deep amber
Luster: Vitreous (glassy)

Identified March 19, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale. Color: Pale yellow to deep amber. Luster: Vitreous (glassy). Crystal Structure: Trigonal/Hexagonal. Cleavage: None (conchoidal fracture). Specific Gravity: 2.65.

Formation & geological history

Formed in igneous or metamorphic environments through hydrothermal processes. The yellow coloration is typically caused by ferric iron impurities or natural irradiation of clear quartz. While this specific sample looks water-worn, quartz can range from millions to over a billion years old.

Uses & applications

Used primarily for jewelry (faceted or cabochons), crystal healing collections, ornamental carvings, and as a decorative landscape stone.

Geological facts

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

Field identification & locations

Identify in the field by its hardness (it can scratch glass and steel knife blades) and its lack of cleavage. It is commonly found in riverbeds, glacial till, and pegmatite veins across Brazil, the USA, and Madagascar. Collectors look for clarity and intensity of color.

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