Ametrine 6mm Round A Grade - 15-16 Inch Pair iron or manganese impurities within

iron or manganese impurities within the stone

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red and gray in swirling circular patterns

but the difference in the pattern really stands out and shows it's individual beauty

Ametrine 6mm Round A Grade - 15-16 Inch Pair iron or manganese impurities withinAmetrine is quartz that occurs in bands of purple and yellow. As the name suggests, it is a combination of Amethyst and Citrine. The different colored zones in the stone result from different oxidation states of iron, due to exposure to different temperatures during its formation. It is believed that Ametrine was first introduced to Europe by a conquistadors gift from Bolivia to the Spanish Queen.