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In opal, characteristic inclusions include tiny tension cracks called centipedes. What do you see? Courtesy...

In opal, characteristic inclusions include tiny tension cracks called centipedes. What do you see? Courtesy...

GIA
In opal, characteristic inclusions include tiny tension cracks called centipedes. What do you see? Courtesy: Dr. Edward J Gübelin Collection

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Quote-worthy Jewelry

Quote-worthy Jewelry

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