metamorphic

Quartzite with Quartz Vein

Metamorphic Quartzite (SiO2)

AI-generated identification · may be incorrect

Hardness of 7 on the Mohs scale, predominantly white to grey in color with a vitreous to greasy luster, massive crystal structure, and lacks distinct cleavage.

Identified August 2, 2026More metamorphic →

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Physical properties

Hardness of 7 on the Mohs scale, predominantly white to grey in color with a vitreous to greasy luster, massive crystal structure, and lacks distinct cleavage.

Formation & geological history

Formed through the metamorphism of quartz-rich sandstone under intense heat and pressure, typically in tectonic orogenic belts over millions of years.

Uses & applications

Used primarily in construction, crushed stone for roads, railroad ballast, and decorative landscaping due to its extreme durability.

Geological facts

Quartzite is extremely resistant to weathering and often forms prominent ridges and hills in the landscape because it erodes much slower than surrounding rocks.

Field identification & locations

Can be identified in the field by its sugary texture on broken surfaces, high hardness that easily scratches glass, and the presence of quartz veins running through it.