mineral

Yellow Quartz (Citrine/Yellow Jasper)

Silicon Dioxide (SiO2)

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

Hardness: 7 on Mohs scale
Color: yellowish-brown to tan
Luster: Vitreous to waxy

Identified April 5, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through hydrothermal processes or crystalization from igneous magma. Can also be found as a secondary mineral in sedimentary environments and riverbeds as water-worn pebbles.

Uses & applications

Used widely in lapidary work, jewelry making, ornamental carvings, and as a healing stone in metaphysical practices.

Geological facts

Yellow quartz is often mistaken for gold by novices, though it is much harder. Most commercial 'citrine' is actually heat-treated amethyst, but natural yellow quartz maintains its color through iron impurities or natural irradiation.

Field identification & locations

Identify by its ability to scratch glass and its lack of cleavage. In the field, look for conchoidal (shell-like) fractures on broken edges. Commonly found in quartz veins or as rounded stream pebbles.

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