mineral

Yellow Quartz (Citrinated Quartz)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Pale yellow to honey brown; Luster: Vitreous (glass-like); Crystal Structure: Hexagonal; Cleavage: None; Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Pale yellow to honey brown
Luster: Vitreous (glass-like)

Identified March 18, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Pale yellow to honey brown; Luster: Vitreous (glass-like); Crystal Structure: Hexagonal; Cleavage: None; Specific Gravity: 2.65

Formation & geological history

Formed in igneous and metamorphic environments, specifically in pegmatites or hydrothermal veins. This specimen shows signs of alluvial weathering (rounded edges from water transport). It likely dates from the Precambrian to Cenozoic eras depending on the local bedrock.

Uses & applications

Used in glassmaking, electronics (piezoelectric properties), and as a gemstone for jewelry. Low-quality tumbled stones are often used for metaphysical decorative purposes.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Iron impurities are typically responsible for the yellow coloration in natural specimens.

Field identification & locations

Identify by its ability to scratch glass and lack of cleavage. It is commonly found in riverbeds, gravel pits, and mountain ranges globally. Collectors should look for translucency and the absence of bubbles (which would indicate glass).

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