Notification of Q1 2018 Trading Update

18 April 2018

GEM DIAMONDS LIMITED

("Gem Diamonds" or "the Company")

Notification of Q1 2018 Trading Update

Gem Diamonds Limited (LSE: GEMD) will be releasing a Trading Update for the period 1 January 2018 to 31 March 2018 at 07:00 BST on Thursday, 26 April 2018.

The Gem Diamonds Limited LEI number is 213800RC2PGGMZQG8L67.

For further information:

Gem Diamonds

Susan Wallace, Company Secretarial department

[email protected]

Celicourt Communications

Mark Antelme / Jimmy Lea

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. www.gemdiamonds.com