Yellow Quartz

Physical Properties

Hardness: 7 on the Mohs scale. Color: Pale yellow to golden. Luster: Vitreous to waxy. Crystal structure: Hexagonal/Trigonal. Cleavage: Poor/Conchoidal fracture. Specific Gravity: 2.65.

Formation & Geological History

Formed from silica-rich hydrothermal solutions or within pegmatites. This golden variety can occur through natural irradiation of iron impurities or via heat treatment of amethyst. Most specimens are found in igneous and metamorphic rocks.

Uses & Applications

Used primarily in jewelry as a gemstone, as a collector's specimen, and occasionally in metaphysical practices. Industrial quartz is used in glassmaking and electronics.

Geological Facts

Naturally occuring yellow quartz is often called Citrine, though much of the golden-yellow quartz on the market is actually heat-treated amethyst. Quartz is the second most abundant mineral in Earth's continental crust.

Field Identification & Locations

Identify by its hardness (will scratch glass), conchoidal (shell-like) fracture, and lack of true cleavage. Commonly found in riverbeds, mountain ranges, and areas with high volcanic or metamorphic activity.

Identified on: 5/18/2026

Mode: Standard