28 April 2017

GEM DIAMONDS LIMITED

("Gem Diamonds" or the "Company")

Michael Lynch-Bell - Change of external directorship

The Company has been informed that, Mr Lynch-Bell, who is currently Senior Independent Non-Executive Director and Audit Committee Chair at Kaz Minerals plc, a Company listed in London, Kazakhstan and Hong Kong, has been appointed Deputy Chair of Kaz Minerals plc with effect from 1 January 2018.

The Gem Diamonds Limited LEI number is 213800RC2PGGMZQG8L67.

For further information:

Gem Diamonds Limited

Susan Wallace, Company Secretarial department
ir@gemdiamonds.com

Celicourt Communications

Joanna Boon/Mark Antelme

Tel: +44 (0) 207 520 9261

ABOUT GEM DIAMONDS:

Gem Diamonds is a leading global diamond producer of high value diamonds. The Company owns 70% of the Letšeng mine in Lesotho and 100% of the Ghaghoo mine in Botswana. The Letšeng mine is famous for the production of large, top colour, exceptional white diamonds, making it the highest dollar per carat kimberlite diamond mine in the world. Since Gem Diamonds' acquisition of Letšeng in 2006, the mine has produced four of the 20 largest white gem quality diamonds ever recorded. The Ghaghoo mine in Botswana has been placed on care and maintenance until market conditions allow for recommencement of production.