Yellow Quartz (Citrine Quartzite)

Physical Properties

Hardness: 7 (Mohs scale); Color: Yellow to golden orange; Luster: Vitreous/Waxy when tumbled; Crystal Structure: Trigonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Formation & Geological History

Formed through the metamorphism of quartz-rich sandstone or through hydro-thermal processes where iron impurities provide the yellow tint. It is commonly found in alluvial deposits or as tumbled river stones.

Uses & Applications

Primarily used in jewelry, as decorative stones/tumbled pebbles, and in crystal healing collections. High-purity quartz is also used in glassmaking and electronics.

Geological Facts

Natural yellow quartz is often confused with heat-treated amethyst. When natural, it is much rarer. In ancient times, it was believed to hold the power of the sun and protect against snake venom.

Field Identification & Locations

Identify in the field by its hardness (will scratch glass) and lack of cleavage. Look for the characteristic yellow hue and translucency. Common in riverbeds and gravel pits.

Identified on: 4/16/2026

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