(IDEX Online) - Bluerock has recovered its largest ever rough gem at its Kareevlei mine, in Kimberley, South Africa. The 58.6-carat stone is a D-color makeable stone - colorless but with spotted black sulphide intrusions.The London-based miner has also reported two other high-value recoveries this month - stones weighing 21.6-carat and 14.3-carat.Mike Houston, executive chairman, said: "This is a very important discovery for BlueRock as it supports the 'size frequency distribution charts' that indicate our pipes will deliver large high value diamonds along with the highly sought after 'run of mine' parcel of diamonds which have secured values of over US$400 per carat in 2021." The 58.6-carat diamond will be sold later this month at the company's August tender. Its final value will be "dependent upon the buyer's confidence of what cut stones can be recovered," said Mr Houston.Pic of the 58.6-ct stone courtesy BlueRock