A large crystal of chrome diopside laying against a quartz matrix.  The crystal is terminated, and has a good green color.

 If I had not purchased this in Madagascar, I would have guessed it was from Pakistan, simply because Malagasy chrome diopsides are usually much smaller, are rarely available as specimens. 

  The few specimens that I have seen on the market have come from (very) old collections, and the overwhelming majority of new material goes to the cutters, so it does not surprise me that pieces like this are so seldom encountered.