mineral

Milky Quartz with Hematite inclusions

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale); Color: White to translucent with reddish-brown staining; Luster: Vitreous to greasy; Crystal structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65.

Hardness: 7 (Mohs scale)
Color: White to translucent with reddish-brown staining
Luster: Vitreous to greasy

Identified June 26, 2026More mineral →

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Physical properties

Formation & geological history

Formed in hydrothermal veins and cooling of silica-rich magma. The reddish staining indicates secondary iron oxide (hematite) infiltration during weathering or late-stage mineral deposition.

Uses & applications

Used in electronics for its piezoelectric properties, glass manufacturing, abrasives, and as decorative gravel or ornamental specimens for collectors.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Hematite-stained quartz is sometimes colloquially called 'strawberry quartz' or 'ferruginous quartz' depending on the depth of color.

Field identification & locations

Identify in the field by its ability to scratch glass, lack of cleavage, and characteristic sugary or crystalline appearance. Found globally in almost all geological environments including mountains, beaches, and riverbeds.

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