In our latest post to the Mardon blog, we discuss the classification/grading/description of the various play of color patterns in precious opal, focusing on the main pattern types, Pinfire, Flash, and Harlequin. Of course, a picture is worth a thousand words, so we show more than tell. Here are a few morsels, photos that we didn’t use, to whet your appetite.
james l. sweaney cga fga. gg
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