Magnet Stone middle

Day 1 of 3 at work of modern music rehearsals for Proms and Edinburgh Festival.
Interesting, is the politest way I can describe the piece we are playing this morning.
The highlight is when we have to "play" these little beauties by throwing them into the air and cos they're magnetic they fly together making a buzzing clattering sound which the composer feels enhances the music...
Still they serve another purpose; today's blip.