Depends on the clarity, size, and color of the diamond. The diamond market also fluctuates, just like any market.
Your answer depends on the quality of the diamond you're buying/ selling.
A lot of money
The most expensive diamond, by definition, is priceless.
The value of a diamond depends on its cut, clarity, colour and carat weight.
Blood Diamond grossed $171,377,916 worldwide.
about $5.60
Blood Diamond grossed $57,377,916 in the domestic market.
$652
72,000
about 20 dollars
diamond jubilee
The amount of money Lou Diamond Phillips won on the show, I'm a Celebrity...Get Me Out of Here, is unknown. He did not pocket any money for himself, he played for a charity.