The Blackbird, also called the Black Stone Violen, is a full-size playable violin made of black diabase after the drawing by Antonio Stradivari. It was designed by Swedish artist Lars Widenfalk and named Blackbird after the Common Blackbird because of it's coloring. Stradivari has a habit of naming his violins after birds.
The rock that the violin is made out of came from his grandfather's tombstone, which was discarded after a joint family grave had been established. The Blackbird is the world's first, and so far only, playable stone violin. Several composers have composed music specifically for the instrument.