mineral

Milky Quartz with Hematite inclusions

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Hardness: 7 (Mohs scale); Color: White, reddish-brown, and black; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65.

Hardness: 7 (Mohs scale)
Color: White, reddish-brown, and black
Luster: Vitreous to waxy

Identified April 6, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: White, reddish-brown, and black; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65.

Formation & geological history

Formed from silica-rich hydrothermal fluids cooling in veins or cavities. The reddish-brown and black patches are inclusions of hematite or goethite, likely formed during the Precambrian to Holocene eras.

Uses & applications

Commonly used for lapidary work (cabochons, beads), decorative garden stones, and as metaphysical or pocket stones for collectors.

Geological facts

Quartz is one of the most abundant minerals in Earth's crust. When hematite is present in large amounts during growth, it can create 'Red Quartz' or 'Fire Quartz'.

Field identification & locations

Identify in the field by its hardness (it will scratch glass), lack of cleavage, and the contrast between the opaque white quartz and the earthy staining. Found globally in riverbeds, mountains, and mines.

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