Coloured stones are beautiful, and their beauty and rarity is an important part of what makes them so VALUABLE . Some have colours so striking that their names are part of common colour descriptions - "ruby red", "sapphire blue", and "emerald green". As well as the 'big 3' there are a multitude of other rare and beautiful gemstones that can be set in fine jewellery. Nearly all natural gemstones are treated to ENHANCE their beauty, but not all of these treatments are ethical or stable. If you are considering buying a fine natural gemstone contact Kayes to arrange a coloured gemstone consultation. More coloured gemstones can be viewed in our VINTAGE COLLECTION.