How Much Is Opal Stone Worth? You must be wondering about the reason for this whopping deviation in the price. So, let me get you out of there. There are various factors (or qualities of opal) that determine opal stone worth. The type, brilliance, origin, color, patterns, fire, scarcity, and transparency are significant reasons to bring such a deviation in the price range of this brilliant gemstone. https://www.rananjayexports.com/blog/how-much-is-opal-stone-worth