22 August 2023

GEM DIAMONDS LIMITED

("Gem Diamonds" or "the Company")

Notification of Half Year 2023 Results and Climate Change Report

Gem Diamonds Limited (LSE: GEMD) will announce its Half Year Results for the six months ending 30 June 2023 and its updated Climate Change Report on Thursday, 31 August 2023.

The Company will be hosting an audio presentation on Thursday, 31 August 2023 at 9:30 BST.  A live audio webcast of the presentation will be available on the Company's website: www.gemdiamonds.com

The Gem Diamonds Limited LEI number is 213800RC2PGGMZQG8L67.

For further information:

Gem Diamonds Limited
Susan Wallace, Company Secretarial department

Tel: +44 (0) 203 043 0280

[email protected]

Celicourt Communications

Mark Antelme/Felicity Winkles

Tel: +44 (0) 207 770 6424

ABOUT GEM DIAMONDS:

Gem Diamonds is a leading global diamond producer of large high value diamonds. The Company owns 70% of the Letšeng mine in Lesotho and is currently in the process of selling its 100% share of the Ghaghoo mine in Botswana. The Letšeng mine is famous for the production of large, exceptional white diamonds, making it the highest dollar per carat kimberlite diamond mine in the world.  www.gemdiamonds.com