Boulder Opal is an absolutely magnificent gemstone. Arguably the rarest of all Opal gems Boulder Opal is a diminishing resource (which means it is genuinely running out). Each Opal is unique, each gemstone is hand-carved from 'veins' of Opal colour that ebb and flow through the heart of the ironstone. If you are looking for a genuinely rare form of Opal that is incredibly unique, then Boulder Opal is the one!
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