A large quartz crystal from Madagascar. There are a few small chips, but I'm offering this as a decorator piece rather than a fine specimen. With the appropriate stand, it would probably look quite attractive on a shelf, or coffee table.
This was my last purchase during my previous Madagascar trip-- I was about to leave for Antananarivo to go to the airport, but I received a call about a new pocket of quartz crystals that had just been found.... it was on the way, so I stopped and picked up the best 3.