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At first glance,the difference between heated and unheated blue sapphires may look almost identical. Their color and clarity can appear quite similar, but there are major differences in their rarity, value, and most importantly, price.   

Heat treatment for sapphires is a common practice in the gemstone industry. It is done to enhance the color and clarity of the stone. Both treated and untreated sapphires are natural gemstones. The presence or absence of treatment can impact their market demand and price. An unheated blue sapphire is rare and highly desirable among collectors and gemstone enthusiasts.  

@damned--irony