mineral

Iron-stained Quartz

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)

Hardness: 7 (Mohs scale), Color: White to tan with reddish-brown staining, Luster: Vitreous to dull, Crystal Structure: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Identified May 31, 2026More mineral →

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Physical properties

Formation & geological history

Formed from hydrothermal veins or as a secondary mineral during the weathering process. The iron oxide (limonite or hematite) stains the surfaces and cracks of the pre-existing quartz during exposure to groundwater and oxygen.

Uses & applications

Primarily used as a common mineral specimen for hobbyists; larger deposits can be used as industrial silica or crushed rock for construction aggregate.

Geological facts

Iron-stained quartz is often called 'golden healer' in metaphysical circles. This specific specimen shows characteristic limonitic staining within fractures and on the surface, giving it its earthy appearance.

Field identification & locations

Identify in the field by its hardness (scratches glass), lack of cleavage, and the presence of rusty-colored residues that cannot be washed off easily. Common worldwide in nearly all geological environments.

Other mineral specimens

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Biotite Schist

Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]

metamorphic