Karelian Diamond Resources has reported that pink diamonds are present in the Lahtojoki deposit. While pink diamonds accounted for less than 5 per cent of the Australian Argyle's mine's diamond yield it generated roughly 50 per cent of the revenue. Image: Karelian Diamond Resources

The Karelian Craton straddles Finland and Russia and is reported to be larger in area than Canada's diamond-rich Slave Lake Craton. Image: Karelian Diamond Resources