mineral

Yellow Quartz (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

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

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

Identified April 22, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed in igneous and metamorphic rocks, specifically in pegmatites or hydrothermal veins where silica-rich fluids crystallize. Its yellow color often comes from trace amounts of iron.

Uses & applications

Commonly used in jewelry as a gemstone, as well as in electronics (quartz oscillators) and abrasive manufacturing. Highly valued by mineral collectors and for metaphysical practices.

Geological facts

Naturally occurring yellow citrine is actually quite rare; most commercial citrine is heat-treated amethyst. Quartz is the second most abundant mineral in Earth's continental crust.

Field identification & locations

Identify in the field by its hardness (will scratch glass), absence of cleavage, and translucent yellow color. Common locations include Brazil, Madagascar, and Russia.