earthstory: This is the Welcome Stranger Nugget.
Discovered in 1869 by Cornishmen John Deason and Richard Oates in Victoria, Australia, it is the largest gold nugget ever discovered.
It weighed in at 69kg (152.1 lb.) and measured 61x31cm (24×12.2″) and it was found just a couple of metres below the surface.
At the time no scale was big enough to weight the nugget so it was broken into 3 pieces and each piece weighed separately.
At todayâ€™s Gold Value the nugget would be worth
$3,786,257.01 AUD (Correct 21/09/2012 Perth Royal Mint)
To read more:
Via Ratak Monodosico.