14 July 2017​

GEM DIAMONDS LIMITED

("Gem Diamonds" or "the Company")

Notification of Trading Update

Gem Diamonds Limited (LSE: GEMD) will be releasing a Trading Update at 07:00 BST on Tuesday, 25 July 2017.

The Gem Diamonds Limited LEI number is 213800RC2PGGMZQG8L67.

For further information:

Gem Diamonds

Susan Wallace, Company Secretarial department

ir@gemdiamonds.com

Celicourt Communications

Mark Antelme / Joanna Boon

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. The Ghaghoo mine in Botswana has been placed on care and maintenance until market conditions allow for recommencement of production. www.gemdiamonds.com