Yellow Quartz (Citrine-colored Quartz)

Physical Properties

Hardness: 7 (Mohs scale), Color: Pale yellow to golden, Luster: Vitreous/Glassy, Crystal Structure: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Formation & Geological History

Formed in igneous pegmatites or hydrothermal veins where silicon-rich fluids crystallize. Its yellow tint often comes from trace amounts of ferric iron or natural irradiation during high-temperature formation.

Uses & Applications

Commonly used in jewelry (as tumbled stones or faceted gems), ornamental carvings, crystal healing collections, and as a source of silicon for electronic components.

Geological Facts

Much of the darker yellow quartz on the market is actually heat-treated amethyst. Natural pale yellow quartz, like this specimen, is more common in its raw tumbled form.

Field Identification & Locations

Identify by its hardness (it will scratch glass) and lack of cleavage. Look for internal veining or 'clouds' common in macroscopic quartz. Found worldwide, with major deposits in Brazil and Madagascar.

Identified on: 4/22/2026

Mode: Standard