A pink diamond is formed under astounding pressure under the earth’s surface when its crystal lattice deforms.

Fancy coloured diamonds, including pinks, generate even higher returns than colourless diamonds. Rare pink diamond prices have increased by 443 percent in the last 10 years and in some cases can reach 50 times the price of a colourless diamond equivalent. The largest mine for pink diamonds is the Australian Argyle mine, although smaller quantities are also mined in Borneo, Guinea, Brazil, Angola and South Africa.