mineral

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale), Color: Pale yellow to honey-orange, Luster: Vitreous/waxy when weathered, Crystal Structure: Hexagonal (trigonal), Cleavage: None/Conchoidal fracture, Specific Gravity: 2.65

Identified May 27, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale), Color: Pale yellow to honey-orange, Luster: Vitreous/waxy when weathered, Crystal Structure: Hexagonal (trigonal), Cleavage: None/Conchoidal fracture, Specific Gravity: 2.65

Formation & geological history

Formed through hydrothermal processes or within igneous and metamorphic rocks. This specific specimen is a 'river rock' or 'tumble' that has been smoothed over thousands of years by water erosion in a stream or beach environment.

Uses & applications

Common quartz is used in glassmaking, abrasives, and electronics. Yellow varieties like citrine are used in jewelry. Small pebbles are often used in decorative landscaping or as worry stones.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Yellow coloration in quartz is often due to iron impurities or natural irradiation. River-worn pebbles like this one are nature's own rock tumblers.

Field identification & locations

Identify by its hardness (it will scratch glass), lack of cleavage, and translucent appearance. Commonly found in riverbeds, mountain streams, and along coastlines globally.