mineral

Quartz (Yellow/Citrine variety)

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Pale yellow to light tan; Luster: Vitreous (glassy); Crystal structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

Hardness: 7 on Mohs scale
Color: Pale yellow to light tan
Luster: Vitreous (glassy)

Identified July 1, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Pale yellow to light tan; Luster: Vitreous (glassy); Crystal structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

Formation & geological history

Formed primarily in igneous rocks such as granites and pegmatites, as well as in hydrothermal veins. Yellow varieties occur due to trace amounts of iron or structural defects within the crystal lattice.

Uses & applications

Used extensively in the glass industry, electronics (piezoelectric properties), and frequently as a gemstone in jewelry or for decorative purposes in metaphysical collections.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Yellow quartz is often called 'Citrine,' though natural citrine is rare; most commercial citrine is heat-treated amethyst.

Field identification & locations

Identify in the field by its hardness (will scratch glass), lack of cleavage, and translucent, glassy appearance. Commonly found in riverbeds or mountain regions globally.