Most people are familiar with the purple of amethyst, or the yellow of citrine–both types of quartz. Sometimes the two occur together in a crystal, and in that case the gem is called ametrine–and properly faceted it can be absolutely beautiful. Some of the best ametrine comes from the Anahí mine in Bolivia–the source of this gem. This absolutely gorgeous ametrine was faceted for Earth’s Treasury by Jordan Wilkins. It weighs 9.87 carats and measures 17.25 x 11.75 x 8.03 mm. It’s a completely natural gem–beware as much of the more intensely-colored ametrine is man-made. Jordan’s opposed bar cut blends the purple and yellow to create facets that flash pink, while others flash mauve or deep yellow.