[March, 2011] One of the places we went with the tour in Amsterdam was a diamond factory.
Of course you can buy one there, but it was not realistic.
The cheapest stone was like a dust and it was about 170 euro and the most expensive one we saw there was about 28000 euro.
The price is apparently decided according to size, cut, colour and transparency.
Fortunately, I did not crave for one, but thought it might be a good idea to buy some for investment in this economic climate.