Ametrine 3x7-6x12mm Chip - 15-16 Inch Diamond Cut Round AA Grade The addition of the rhodium

The addition of the rhodium plating not only protects these from oxidation but also highlights the Widmanstätten pattern

and those that still exist today have been passed down for generations

but rather a dark variety of Carnelian

magnesium and other metals that give it its color

iron or manganese imperfections

Ametrine 3x7-6x12mm Chip - 15-16 Inch Diamond Cut Round AA Grade The addition of the rhodiumAmetrine 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.