Diamond is the hardest known natural material on both the Vickers scale and the Mohs scale. Diamond’s great hardness relative to other materials has been known since antiquity, and is the source of its name.Diamond hardness depends on its purity, crystalline perfection and orientation: hardness is higher for flawless, pure crystals oriented to the direction.

G.M.P. is a diamond dealing firm and a global supplier of rough diamonds directly from African mines.

With expertise in the diamond mining industry, G.M.P. founder decided to bring his passion and enthusiasm for all aspects of the diamond industry to G.M.P. Our head office is located right in the heart of the diamond industry, Accra, Ghana. In the years since its initial conception, G.M.P. has triumphantly established a reliable global network of diamond trading.