Two parallel zones of smoky quartz are evident in these three ametrine specimens (27.3–299.7 ct) from the new Yuruty mine in Bolivia. Photo courtesy Michael S. Krzemnicki, SSEF. Ametrine ...
This amazing ametrine trilliant cut features a multitude of facets to create internal reflections that blend the amethyst and citrine colors. Photo by Robert Weldon/GIA, courtesy Minerales y Metales ...
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