Diamond Buzz on Instagram: "SAPPHIRE COLOURS BY ORIGIN In general, the intensity of blue is the most important factor with blue sapphires, meaning a big stone with a washed-out blue colour will always cost less than a small vivid blue stone. The most desirable sapphire colour is the intense cornflower blue which is not too dark. In general, stones that have too dark or too light colours are not that valuable. However, light blue stones have greater brilliance than darker ones. Sapphire…
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