At 555.55 carats the gem is considered extremely heavy for a diamond, weighing about the same as a banana. The rock is expected to fetch over £4.4 m ($6m) at a Sotheby's auction in London by the ...

AC/DC is one of the bestselling rock acts of all time all around the ... The Australian group earns their first diamond-certified single as “Thunderstruck” collects the honor.