igneous

Granitic Quartz (with Feldspar inclusions)

Quartz (SiO2) with Potassium Feldspar (KAlSi3O8)

Hardness: 6-7 on Mohs scale; Color: Milky white to translucent with orange/pink inclusions; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture).

Hardness: 6-7 on Mohs scale
Color: Milky white to translucent with orange/pink inclusions
Luster: Vitreous to greasy

Identified April 5, 2026More igneous →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Milky white to translucent with orange/pink inclusions; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture).

Formation & geological history

Formed through the slow cooling of silica-rich magma deep within the Earth's crust. As the magma crystallizes, quartz and feldspar form interlocking grains. This specimen appears water-worn, likely from a fluvial or glacial environment.

Uses & applications

Used primarily as decorative landscaping stone, in construction aggregates, and occasionally as a tumbling rough for hobbyists.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. The pink/orange coloring in this specimen is caused by inclusions of orthoclase feldspar or iron oxide staining within the quartz matrix.

Field identification & locations

Identify by its ability to scratch glass and lack of cleavage planes. Common in areas with exposed granite batholiths or glacial till. Look for the characteristic 'sugary' texture on weathered surfaces.

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