mineral

Yellow Quartz (Citrine type/Tumbled Quartz)

Silicon Dioxide (SiO2)

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

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

Identified March 24, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed in igneous (pegmatites) or metamorphic environments through the crystallization of silica-rich hydrothermal fluids. This specific tumbled specimen likely formed millions of years ago and was smoothed by water or artificial tumbling.

Uses & applications

Used primarily in jewelry (cabochons), ornamental decor, and by collectors. In industry, quartz is used for electronics and glass making, though this high-clarity variety is usually reserved for aesthetics.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Specimens like this are often called 'the Merchant\'s Stone' in folklore, believed to attract wealth. Most bright orange citrine on the market is actually heat-treated amethyst, but natural pale yellow quartz is common.

Field identification & locations

Identify in the field by its hardness (it will scratch glass and steel knife blades), lack of cleavage, and translucent appearance. Commonly found in riverbeds or mountain outcroppings globally.

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