Tourmaline is a borosilicate mineral (Al6B3Fe3H10NaO31Si6) rich in aluminum, iron, and sodium with a trigonal crystal structure.
Commonly black in color, it also has a wide range of colors in the rainbow depending on its chemical composition. Tourmaline has a unique property of being naturally polarized and able to generate voltage when heated, which has been used by chemists and jewelers since its discovery in the 19th century as a consistent source of polarized light in research and gem polishing.
This item is 11.25" x 4.25" and weighs 7lbs 7.3oz.
Shipping cost is based on weight. Just add products to your cart and use the Shipping Calculator to see the shipping price.
We want you to be 100% satisfied with your purchase. Items can be returned or exchanged within 30 days of delivery.