mineral

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Opaque white to creamy with brown/yellow iron oxides; Luster: Vitreous to greasy; Structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); SG: ~2.65.

Hardness: 7 on Mohs scale
Color: Opaque white to creamy with brown/yellow iron oxides
Luster: Vitreous to greasy

Identified May 18, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Opaque white to creamy with brown/yellow iron oxides; Luster: Vitreous to greasy; Structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); SG: ~2.65.

Formation & geological history

Formed from hydrothermal solutions or cooling magma in veins and pegmatites. The white color is caused by tiny fluid inclusions trapped during crystal growth. Iron staining occurs from weathering of nearby minerals.

Uses & applications

Used in glass manufacturing, electronics, jewelry (cabochons), landscaping, and as a collector's specimen. It is also common in various construction materials.

Geological facts

Quartz is one of the most abundant minerals in Earth's crust. Milky quartz specifically is one of the most common varieties and is often the 'vein quartz' that prospectors search for to find gold.

Field identification & locations

Identify by its hardness (scratches glass), lack of cleavage, and characteristic waxy/glassy appearance. It is found globally in riverbeds, mountains, and desert floors.

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