mineral

Quartz with Hematite Inclusions

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)

Hardness: 7 on Mohs scale; Color: Clear to milky white with reddish-brown or orange spots; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture.

Hardness: 7 on Mohs scale
Color: Clear to milky white with reddish-brown or orange spots
Luster: Vitreous to waxy

Identified June 25, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Clear to milky white with reddish-brown or orange spots; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture.

Formation & geological history

Formed in hydrothermal veins or pegmatites where silica-rich fluids cool. The red color comes from iron oxide (hematite) staining or inclusions deposited during or after the quartz crystal growth.

Uses & applications

Used primarily in jewelry as 'Ferruginous Quartz' or 'Harlequin Quartz,' as well as for decorative items and metaphysical collecting.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Specimens like this, showing red iron staining, are often called 'Fire Quartz' in the gem trade.

Field identification & locations

Identified by its high hardness (cannot be scratched by steel), glassy appearance, and specific orange-red iron oxide patterns. Commonly found in Brazil, Madagascar, and the USA.

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