Opal Emerald Gold Jewellery Necklace.
By Stone.
The term opalescence is commonly used to describe this unique and beautiful phenomenon, which in gemology is termed play of color. In gemology, opalescence is applied to the hazy-milky-turbid sheen of common or potch opal which does not show a play of color. Opal escence is a form of adularescence.
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