Tone (the gem’s relative lightness or darkness)įor a Green Sapphire the colour is the most important factor when it comes to determining the gemstones quality.

An excellent cut is one that uses these factors to bring out the best of the gemstone in terms of colour and liveliness.Ĭolour: Colour should be evenly distributed across the stone. This means that there will be no inclusions visible to the eye.Ĭut: The quality of the cut is a combination of symmetry, facet alignment, proportioning and the final surface finish and polish of the gemstone. For the most part, the Green Sapphires we source at Fenton are eye clean. Typically inclusions in Green Sapphires include colour zoning (often with blue, yellow or colourless bands), silk (find needle-like inclusions) and feathers (fingerprint inclusions).

Here’s what we look for.Ĭlarity: As creations of nature, all gems will have clarity characteristics such as tiny lines of growth, crystals or needles, which may be visible to the naked eye. Our gemmologists personally select each of our Green Sapphires for its unique properties. You may have heard of the 4 C’s, but unlike diamonds, there is no universal grading system for coloured stones. Typically Green Sapphires sourced from Australia and Thailand have a higher Iron content, meaning they have a richer and deeper green colour! At Fenton we source ours from: Australia, Sri Lanka, Thailand and Tanzania. Green Sapphires can be sourced from several countries.

Sapphire blue green