mineral

Iron-Stained Quartz Pebble

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Hardness: 7 on Mohs scale; Color: Milky white to tan with patches of reddish-brown and orange; Luster: Vitreous to waxy (when wet/tumbled); Crystal Structure: Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Milky white to tan with patches of reddish-brown and orange
Luster: Vitreous to waxy (when wet/tumbled)

Identified May 9, 2026More mineral →

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Physical properties

Formation & geological history

Formed via hydrothermal activity where silica-rich fluids crystallize in veins. This specific specimen has been weathered and rounded by water transport in a river or beach environment, where iron oxide (rust) from the surrounding soil or water stained the fractures and surface.

Uses & applications

Used primarily as decorative gravel, in landscaping, or as a collection piece for beginner rockhounds. Pure quartz is used in glass making and electronics.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Specimens like this one get their reddish-orange hue from 'hegetite' or 'limonite' staining, which is essentially natural rust infiltrating the micro-cracks of the stone.

Field identification & locations

Identified in the field by its hardness (it will scratch glass), its lack of cleavage, and its translucent quality. It is commonly found in riverbeds, glacial tills, and along coastal shorelines globally.

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