Breccia

About it

Rock of broken, sharp-edged fragments cemented together; the angular pieces show they did not travel far. Forms in fault zones, landslides, caves, and volcanic vents, and some polished breccias are used as decorative stone.

Type

Rock (sedimentary)

Group

Sedimentary (clastic)

Colours

multicoloured, grey, red, brown

Transparency

opaque

Typical values: real specimens vary. For more, see mindat.org.