Ametrine 13x17-18x25mm Nugget - 15-16 Inch USA known as sheet silicates because

known as sheet silicates because they form in distinct layers

Most commonly mined in Madagascar

and it can be mottled or striated with veins of these colors

oil and succinic acid

Robles is a light

Ametrine 13x17-18x25mm Nugget - 15-16 Inch USA known as sheet silicates becauseAmetrine 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.