We first look at the diamond with the naked eye to check that the diamond is eye clean. We then look under 10 x magnification to check the position and size of inclusions. It is important to remove diamonds with large black impurities and also those which reflect around the diamond.
We look under various lighting conditions to make an optical assessment of the fire, scintillation, brightness and contrast of the diamond. We also then assess the lustre of the diamond to check how well the light reflects off the facets and also whether the diamond has any milkiness.
For round diamond we check the quality of the Hearts and Arrows pattern, ensuring the diamond has perfect optical symmetry to give the best light return. Fancy shaped stones, like princess cut, are checked to make sure they are the right shape and proportions.
We then put it in a white tray to check the colour of the stone and see if the diamond has any colour overtones. Stones can have green or brown tinges depending upon their country of origin and this characteristic isn’t graded by GIA.
Lastly we check the documentation and provenance of the diamond. This is to ensure not only every diamond that we offer complies with the Kimberley process, but that we know the exact details of the supply chain of the diamond, so we can guarantee every diamond passes our ethical and quality standards. You can buy with confidence knowing that our diamond experts have checked every detail of the diamond to ensure it will match the highest of expectations.