Heat treatment removes silk (cloudy appearance) in the stone but it does not change the colour of the stone. Many Sapphires, especially Australian stones, are heat treated – a very common practice in many coloured gemstones within the jewellery industry. If you are choosing for your fiancé, and you are not sure what she would like, choosing an oval or round cut is the safest as emerald cut or any fancy cuts are of more specific choice. The cut of a stone is the second important decision you will make when choosing your Sapphire, as that will directly influence the design of your engagement ring. Pink Sapphires are definitely gaining popularity, available from pastel pink to rich vibrant hot pinks, but our all time favourite are Padparadscha Sapphires. These Sapphires have been the center piece to countless engagement rings for decades. Most of us are familiar with Blue Sapphires, where Australian blue stones are much darker to Ceylon blue (a rich vibrant blue).
Probably the most interesting are Parti Sapphires (where two or more colours create a spectacular effect, primarily yellow and blue combination, creating green variations.) Sapphires are incredible gemstones available in nearly every colour under the sun (except for red) and our first point of attraction to them is their colour. What you need to know about Sapphires before choosing one
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