metamorphic

Green Quartzite

Quartzite

AI-generated identification · may be incorrect

Hardness of 7 on Mohs scale, green color often due to fuchsite or other impurities, vitreous luster, massive crystalline structure, non-foliated, specific gravity around 2.65.

Identified September 19, 2026More metamorphic →

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Physical properties

Hardness of 7 on Mohs scale, green color often due to fuchsite or other impurities, vitreous luster, massive crystalline structure, non-foliated, specific gravity around 2.65.

Formation & geological history

Formed by the metamorphism of quartz-rich sandstone under heat and pressure. The green color is often from trace amounts of chromium-rich mica (fuchsite).

Uses & applications

Used as decorative stone, in construction, and sometimes tumbled for collection or simple jewelry.

Geological facts

When heavily included with fuchsite, it is often called Aventurine, which can exhibit a spangled effect (aventurescence).

Field identification & locations

Identified by its high hardness (scratches glass), grainy but fused texture, and lack of foliation. Often found in riverbeds or glacial deposits as rounded cobbles.