Lucara closed a diamond tender last month. The company said the tender was "extremely well attended" with a total of 123 companies attending and 47 companies winning one or more tender lots.

"Attendance at our sales remains high, a testament to our well-established client base and Karowe's production profile, which continues to be well regarded and sought after in the marketplace. This is further evidenced by our growth with the client base for Clara which has grown from 4 to over 20 customers since the beginning of the year. Ramp up continues on plan, with transactions now occurring bi-weekly," said Thomas.