All diamonds are formed when carbon molecules are exposed to intense heat and pressure up to 200kms within the earth’s mantle. This magic process takes millions of years but when it comes to forming coloured diamonds nature’s alchemy is even more complex and rarefied. These unnatural occurrences aren’t commonplace which explains the scarcity
of coloured stones.

For a coloured diamond to form the crystallizing carbon atoms must be impacted by outside trace elements, pressure changes or exposed to radiation during the evolution process. For example when hydrogen
meets the carbon atoms a diamond of violet colour emerges, when nitrogen is present a diamond of yellow or orange hue can result and
when the crystalline element boron is prevalent a diamond of a blue
shade will result.

Compression alters a developing diamond’s structure so when enormous pressure is exerted on a stone its structure and very fabric can be changed, resulting in brown, red purple or pink stones whilst the impact
of the extremities of radiation on a fully developed stone can result in a green colouring.