mineral

Quartz with Mica

Silicon Dioxide (SiO2) with Mica group inclusions

Hardness: 7 on Mohs scale (quartz), 2.5-3 (mica); Color: Off-white/milky quartz with dark grey/black mica flecks; Luster: Vitreous to dull; Crystal structure: Trigonal (quartz), Monoclinic (mica); Specific gravity: ~2.65

Hardness: 7 on Mohs scale (quartz), 2
Color: Off-white/milky quartz with dark grey/black mica flecks
Luster: Vitreous to dull

Identified July 22, 2026More mineral →

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Physical properties

Formation & geological history

Formed in intrusive igneous rock environments such as pegmatites or granitic magma chambers, or within metamorphic rocks where silica-rich fluids crystallized slowly under high heat and pressure.

Uses & applications

Used as a decorative rock pebble, in landscaping, as a mineral specimen for education, or as crushed aggregate in construction.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Mica minerals embedded within quartz often create a subtle glittering effect when turned in light.

Field identification & locations

Identified by its hard, off-white glassy-to-milky appearance host rock containing soft, flaky dark metallic or dark grey mineral inclusions. Commonly found in riverbeds, gravel paths, and granite outcrops worldwide.

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