Large rock recovered from lake likely fragment of Chelyabinsk meteorite

BBC : On 15 February 2013 a large meteor exploded over Chelyabinsk, Russia. One of the fragments was believed to have caused a 6-m hole in the ice on Lake Chebarkul. A team has now recovered what appears to be that fragment. The rock was 1.5 m at its widest point, and it weighed more than 570 kg before the scale broke, preventing an accurate measurement. But lifting the rock out of the lake caused it to fracture into several smaller pieces. Caroline Smith of London’s Natural History Museum confirmed that the rock was a meteorite based on the presence of fusion crust, a glassy surface caused by melting as the meteorite passed through the atmosphere, and on remaglypts, indentations common on a meteorite’s surface. The recovery efforts were hindered because the meteorite was in deeper water than expected. Other potential fragments have also been found, but only a few of them were meteorites.