Sorting and Valuing
One of the key activities of the Diamond Trading Company Botswana (DTCB) is the sorting and valuation of rough diamonds. When diamonds arrive from the mines, they are sorted into different categories according to their size, shape, quality and colour.
The DTCB currently sorts diamonds into around 11,344 categories. The sorting process ensures the correct valuation of all mines’ productions. It also ensures that a consistent assortment of diamonds can be delivered to the DTC clients. Consistency is ensured by the use of samples that guide decision making on shape, quality and colour.
The offices which sort and value diamonds for De Beers are DTC Botswana, DTC South Africa, Namibia DTC, and DTC London.