Ametrine 6mm Round A Grade - 15-16 Inch Pebble Like all other natural turquoise

Like all other natural turquoise

the treated stones are cut

colored by trace amounts of chromium and/or vanadium to range in hue from yellow to green to blue to green

If you are a collector of cool rocks

Ametrine 6mm Round A Grade - 15-16 Inch Pebble Like all other natural turquoiseAmetrine 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.