mineral

Ferruginous Quartz

Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)

Hardness: 7 (Mohs scale); Color: Oranges, reds, and browns due to iron staining; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Hardness: 7 (Mohs scale)
Color: Oranges, reds, and browns due to iron staining
Luster: Vitreous to greasy

Identified June 8, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: Oranges, reds, and browns due to iron staining; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Formation & geological history

Formed in hydrothermal veins or as a secondary mineral where iron-rich fluids interact with quartz crystals. The orange-red hue is caused by hematite or limonite inclusions during or after crystal growth.

Uses & applications

Used primarily by collectors and in metaphysical jewelry (often called 'Healer's Gold' or 'Hematoid Quartz').

Geological facts

The name 'ferruginous' comes from the Latin word 'ferrum', meaning iron. It is a common variety of quartz found globally where iron oxides are present in the soil or rock matrix.

Field identification & locations

Identify in the field by its hardness (will scratch glass) and its characteristic conchoidal fracture. Found frequently in gravel pits, riverbeds, and near iron-ore deposits.

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