2/17/2023 0 Comments Types of opalValuing Opal is extremely complex! Forget the “4 C’s” Opal requires the detailed examination of over 13 characteristics to assess value: Australian Opal Cutters Black Opal is Guaranteed to be free of dyes and artificial colour. Black Opal is a diminishing resource with anecdotal evidence suggesting increases in value of up to 15% per annum. Black Opal can only be found at Lightning Ridge in N.S.W.
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