Notification of Q1 2025 Trading Update

25 April 2025

GEM DIAMONDS LIMITED

("Gem Diamonds" or "the Company")

Notification of Q1 2025 Trading Update

Gem Diamonds Limited (LSE: GEMD) will be releasing a Trading Update for the period 1 January 2025 to 31 March 2025 on 30 April 2025.

The Gem Diamonds Limited LEI number is 213800RC2PGGMZQG8L67.

For further information:

Gem Diamonds

Kiki Constantopoulos, Company Secretary

ir@gemdiamonds.com

Celicourt Communications

Mark Antelme/Felicity Winkles

Tel: +44 (0) 207 777 6424

About Gem Diamonds:

Gem Diamonds is a leading global producer of high value diamonds. The Company owns 70% of the Letšeng mine in Lesotho. 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