mineral

Quartz with Mica (Granitic / Pegmatitic Quartz)

Silicon Dioxide (SiO2) with Mica group minerals

Hardness 7 on Mohs scale (quartz component); colors range from off-white, beige, translucent brownish-grey to dark grey/black mineral veins; vitreous to greasy luster; hexagonal crystal system in pure forms, granular/massive texture in chunk form; specific gravity 2.65.

Identified July 22, 2026More mineral →

Explore Quartz with Mica (Granitic / Pegmatitic Quartz) in the encyclopedia →

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Physical properties

Formation & geological history

Formed in plutonic igneous environments, typically pegmatites or hydrothermal veins where silicon dioxide crystallizes alongside mica and feldspar under high temperature and pressure deep within Earth's crust.

Uses & applications

Used in construction aggregates, landscaping, industrial silica production, electronics (piezoelectric quartz), and basic mineral collection.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Specimens like this often feature silvery muscovite or dark biotite mica inclusions, giving them a slightly glittery appearance when moved under light.

Field identification & locations

Identified by its ability to scratch glass (Mohs 7), lack of cleavage on the quartz parts, and patchy presence of dark/reflective mica flakes. Commonly found in stream beds, gravel pits, and mountainous granitic regions globally.

Other mineral specimens

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Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Sandstone with Mineral Veining or Crust

Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)

sedimentary

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

mineral

Gypsum (variety Selenite or Alabaster)

Calcium sulfate dihydrate (CaSO4·2H2O)

Mineral

Nephrite Jade

Nephrite

Mineral/Rock