(by The Gem Museum & Far East Gems & Jewellery)
But what about coloured gemstones like rubies, sapphires, spinels, emeralds, aquamarine and more? How do we choose a coloured gemstone and what factors determine its price?
First of all, gemstones are always chosen for their beauty when we buy them, whether diamonds or other type of coloured gemstones. While beauty is in the eye of the beholder, there are standard attributes that we can look out for to determine the beauty and worth of a gem.
Just as white (or rather colourless) diamonds are chosen base on the 4Cs attributes, we can also use 4Cs as our buying guide for coloured gemstones. Let's talk about them and other tips here:
For coloured gemstones, the more vivid, intense, stronger or fancier the colour, it will be considered as more beautiful and hence the price will be higher per carat. For example, if based on colour alone, a pale light blue colour sapphire compared to a royal blue sapphire will be more affordable. Lucky you, people who like pale, pastel colour for gems!
Left: 1.97 ct Sapphire S$350/ct
Right: 1.34 ct Royal Blue Sapphire S$4,500/ct
Cut & Carat
Heat or no Heat
When you shop for coloured gemstones, some of them are labelled as 'No Heat'. It means that the gemstone has not undergone heat treatment to enhance its colour. Heat treatment is an industry practice to enhance the colour of the gemstones and the result is a permanent colour change and thus an acceptable industry practice. This makes beautiful colour gemstones available to more people at prices within their reach. The colour is naturally beautiful and thus, they are rare and priced higher per carat.
If you are interested to learn more, you can join the free Gem Discovery Masterclass brought to you by The Gem Museum. Class information is available HERE.
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