Citrine or Yellow Quartz

Physical Properties

Hardness: 7 on Mohs scale; Color: transparent yellow to golden brown; Luster: Vitreous; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Formation & Geological History

Formed in igneous and metamorphic environments, often in hydrothermal veins or as a secondary mineral in geodes. Natural citrine is rare; many commercial specimens are heat-treated amethyst.

Uses & Applications

Primarily used in jewelry (rings, pendants), as a decorative gemstone, and in metaphysical collecting as a 'success stone'.

Geological Facts

Natural citrine is quite rare in nature. Most citrine on the market is actually amethyst or smoky quartz that has been heat-treated to change its color from purple/grey to yellow.

Field Identification & Locations

Identify by its 7 hardness (it will scratch glass) and lack of cleavage. Common locations include Brazil, Madagascar, and Russia. Look for the absence of bubbles (which would indicate glass).

Identified on: 5/9/2026

Mode: Standard