The first diamond field in south africa was found by accident .
a farmer's son was picking up some pretty pebbles for a game.
one pebble turned out to be a diamond.
the world's largest diamond was unearthed in 1950 in south africa.
it was dug out of a mine owned by Sir Thomas Cullinan.
The Cullinan diamond weighed a little over 11/4 pounds.
it was split into 105 smaller diamond.