mineral

Quartz Pebble (Iron-stained)

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale), Color: White to orange-tan due to iron oxide staining, Luster: Vitreous to waxy (smooth surfaces), Crystal structure: Hexagonal/Trigonal (though microcrystalline or massive in this pebble form), Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Identified April 11, 2026More mineral →

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Physical properties

Formation & geological history

Formed through hydrothermal processes in veins or within cooling igneous bodies. This specific specimen has been chemically weathered and physically eroded by water (stream or coastal action) to its current rounded shape. Age varies by location, often millions of years old.

Uses & applications

Quartz is used in glassmaking, abrasives, and as a component in construction concrete. These specific rounded pebbles are popular in landscaping, aquarium decor, and home rock collections.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. The orange hue in this pebble is likely 'Limonite' or 'Hematite' staining, which are iron oxide minerals that coated the quartz during environmental exposure.

Field identification & locations

Identify in the field by its hardness (it will easily scratch glass) and lack of cleavage. It is extremely common in riverbeds, glacial deposits, and beaches globally. It can survive long transport distances due to its high chemical and physical durability.

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