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By Robin Skibicki There are several varieties of gemstones that display optical phenomena, which describes the many ways light interacts with the structural features or inclusions (internal characteristics) in the gemstone. Often these gemstones will be fashioned in a particular way that best displays these effects. The science of optical phenomena can be fascinating, although the mystery and allure of these effects are what initially attract us! In this article, we鈥檒l discuss six of the most familiar (and magical) displays of optical phenomena in gemstones. Adularescence Adularescence is the phenomena typically seen in moonstone, which is a member of the