Rock Identifier
Yellow Quartz (Silicon Dioxide (SiO2)) — mineral
mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale), Color: Pale yellow to golden, Luster: Vitreous to waxy (when polished), Crystal structure: Hexagonal/Trigonal, Specific Gravity: 2.65

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Physical properties

Hardness: 7 (Mohs scale), Color: Pale yellow to golden, Luster: Vitreous to waxy (when polished), Crystal structure: Hexagonal/Trigonal, Specific Gravity: 2.65

Formation & geological history

Formed in hydrothermal veins or igneous rocks like granite. This specific specimen appears to be water-worn or tumbled, likely sourced from riverbeds or coastal deposits where quartz has been eroded and smoothed over time.

Uses & applications

Used in gemstone therapy, jewelry making (cabochons), and as decorative aquarium or garden stones.

Geological facts

Yellow quartz is often confused with Citrine; however, Citrine is usually clearer. When quartz gets its yellow color from iron inclusions it is often referred to as 'golden quartz' or 'yellow jasper' if it is opaque.

Field identification & locations

Identify by its hardness (it will scratch glass and steel) and lack of cleavage. Common in many environments worldwide due to its chemical stability.