The Collaborative International Dictionary of English v.0.48:

Breccia \Brec"cia\, n. [It., breach, pebble, fragments of stone,
   fr. F. br[`e]che; of German origin. See Breach.] (Geol.)
   A rock composed of angular fragments either of the same
   mineral or of different minerals, etc., united by a cement,
   and commonly presenting a variety of colors.
   [1913 Webster]

   Bone breccia, a breccia containing bones, usually
      fragmentary.

   Coin breccia, a breccia containing coins.
      [1913 Webster]

WordNet (r) 3.0 (2006):

breccia
    n 1: a rudaceous rock consisting of sharp fragments embedded in
         clay or sand