Metamorphic
Brecciated Quartzite
Brecciated Quartzite
AI-generated identification · may be incorrectHardness of ~7 on the Mohs scale, typically gray, white, and black mottled colors, dull to waxy luster, massive crystalline structure with prominent angular fragments (breccia) cemented together, no cleavage, specific gravity around 2.6-2.7.
Identified More metamorphic →
Explore Brecciated Quartzite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of ~7 on the Mohs scale, typically gray, white, and black mottled colors, dull to waxy luster, massive crystalline structure with prominent angular fragments (breccia) cemented together, no cleavage, specific gravity around 2.6-2.7.
Formation & geological history
Formed through the metamorphism of quartz-rich sandstone, followed by tectonic fracturing and subsequent cementation (often by silica) creating the brecciated texture.
Uses & applications
Used primarily as decorative stone, in landscaping, and sometimes cut and polished for lapidary uses or collecting.
Geological facts
The brecciated texture indicates a history of intense geological stress and faulting after the initial metamorphism.
Field identification & locations
Identifiable by its high hardness (scratches glass), massive quartz composition, and distinct angular fragments within the matrix. It is commonly found in areas with a history of significant tectonic activity.
More like this
Other metamorphic specimens
Nephrite Jade
Nephrite
Mineral/Rock
Amphibolite
Amphibolite
metamorphic
Rhodonite
Manganese Silicate (Mn, Fe, Mg, Ca)SiO3
mineral
Rhodonite
(Mn,Fe,Mg,Ca)SiO3
mineral
Greenschist
Greenschist (containing Chlorite, Actinolite, and Epidote)
metamorphic
Garnet
Garnet group: X3Y2(SiO4)3 (commonly Almandine-Pyrope series)
mineral