Ametrine 13x17-18x25mm Nugget - 15-16 Inch Germany Petrified Wood Agate is formed

Petrified Wood Agate is formed from the petrifaction process of primeval trees over the course of many years

Generally this material is used for transistors and heat sinks and only recently has been used for jewelry and healing

but is prized

Viking explorers used thin pieces of Iolite as the world’s first polarizing lens to help them determine the exact location of the sun for navigation

Shungite has been used as a folk medical treatment since the early 18th century

Ametrine 13x17-18x25mm Nugget - 15-16 Inch Germany Petrified Wood Agate is formedAmetrine 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.