Breccia is a term most often used for clastic sedimentary rocks that are composed of large angular fragments. The spaces between the large angular fragments can be filled with a matrix of smaller particles or a mineral cement that binds the rock together. Cave Creek Landscape Boulders from the Shasta CA region are such a stone material, another is Breccia Onociata marble from Italy..

Breccia Oniciata marble from Italy is recommended for interior usage including flooring, counter tops and back splashes. It features variations of beige, pink and cream with light veining.

Breccia forms where broken, angular fragments of rock or mineral debris accumulate. One possible location for breccia formation is at the base of an outcrop where mechanical weathering debris accumulates. Another would be in stream deposits near the outcrop such as an alluvial fan. Some breccias form as debris flow deposits. The angular particle shape reveals that they have not been transported very far (transport wears the sharp points and edges of angular particles into rounded shapes). After deposition, the fragments are bound together by a mineral cement or by a matrix of smaller particles that fills the spaces between the fragments.
Breccia Oniciata marble from Italy design ideas on Houzz

Breccia Stone Info