mineral

Milky Quartz with Iron Inclusions

Quartz (Silicon Dioxide, SiO2)

Hardness: 7 (Mohs scale); Color: White to opaque white with brownish-orange rust-colored iron oxide staining; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 (Mohs scale)
Luster: Vitreous to greasy

Identified May 29, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the crystallization of silica-rich hydrothermal fluids in veins or pegmatites. The iron staining occurs when the specimen is exposed to groundwater carrying iron minerals like limonite or hematite. These are common throughout Earth's geological history.

Uses & applications

Industrial uses include glass making, abrasives, and electronics. This specific raw specimen is primarily for education, collecting, or decorative landscaping.

Geological facts

Quartz is one of the most abundant minerals in Earth's crust. It is piezo-electric, meaning it can generate an electric charge in response to mechanical stress. The white color in 'Milky Quartz' is caused by tiny fluid inclusions trapped during growth.

Field identification & locations

Identify in the field by its hardness (it will easily scratch glass), its lack of cleavage, and its waxy/glassy appearance. It is found globally in almost all geological environments, especially in mountain ranges and stream beds.

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