Chunk of the Chelyabinsk Meteor

Origin
The Chelyabinsk meteor was a superbolide caused by a near-Earth asteroid that entered Earth's atmosphere over Russia on 15 February 2013 at about 09:20 YEKT (03:20 UTC), with a speed of 19.16 +/- 0.15 kilometres per second (60,000 - 69,000 km/h or 40,000 - 42,900 mph). It quickly became a brilliant superbolide meteor over the southern Ural region. The light from the meteor was brighter than the Sun, even at 100 km distance. It was observed over a wide area of the region and in neighbouring republics. Eyewitnesses also felt intense heat from the fireball.

Effect
When thrown, a large sonic boom will be produced, causing damage to objects in a 100 foot radius. The user will not be affected. The harder it is thrown, the more powerful the effect.