Ensure also that it is untreated and naturally coloured. The more vibrant the colour of a sapphire and the fewer inclusions it has, the more valuable it will be. It is the only sapphire by which a lower colour saturation leads to a higher price.Should you wish to purchase a sapphire, take care that it is “lively” it should be lustrous and radiant. For this effect to be visible, the stone must be shaped and polished, rather than cut.A further speciality is the “padparadscha” (Sinhala: “lotus blossom”), a sapphire with a pink-orange to orange-pink hue, mostly found in Sri-Lanka.
Sapphires reach higher weights than rubies, therefore for investments it is wise to purchase larger stones, ideally upwards of 3 ct.The most common cuts for sapphires are oval or cushion cuts round cuts will command a higher price, while other cuts, such as heart or marquise, lead to a price reduction.One special form is the star sapphire: intersecting titanium oxide crystals (rutile) inside the stone create the optical effect of a six-pointed star that travels across the surface of the stone as it is moved under a light source. Recently very beautiful blue sapphires have been discovered in Ethiopia.The larger a sapphire, the more valuable it is. Sapphire that can be cut therefore occurs in several areas around the world: in extensions of the Himalayas, (Indian and Pakistani Kashmir, Burma, Cambodia, Thailand, Vietnam), in the region of the East African Rift (Sri Lanka), in Madagascar, in Montana in the USA and in Australia. This combination of corundum and titanium is rare on Earth, though not as rare as that of corundum with chromium, which results in ruby. The Queen of Sheba’s sapphire mines have long been legendary.The blue colour is a result of titanium permeating the stone. One of the longest sought-after gemstones and most desired in blue, it has been used in jewellery and to store wealth for thousands of years.
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