However, the structural anomalies that give rise to the distinguishing features of star sapphires have made them a special category in the gemstone market, that are sought out by customers who seek something out of the ordinary. Star sapphires are relatively rare and hence command a higher market value, however, their value is determined by customer demand, as many persons prefer to choose to go for conventional gemstone types. A feature, when it is strongly present and is highly valued by jewellers and customers alike. Asterism is a phenomenon in gemstones, notably in sapphires, that creates the visual imprint of vertical and/or horizontal lines that cut across the surface of the gemstone. They differ from conventional sapphire gemstones owing to the presence of a feature called asterism. Star Sapphires are an interesting addition to the world of corundum gemstones.
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