Iolite Faceted 10mm Energy Prism - 15-16 Inch Star Cut Round ” Tourmaline is unusual in

” Tourmaline is unusual in that it is both pyroelectric and piezoelectric

Authentic DZI beads were used in ancient times in India

Historically

Once cooled

it lightens because of further weathering and becomes Malachite

Iolite Faceted 10mm Energy Prism - 15-16 Inch Star Cut Round ” Tourmaline is unusual inIolite most commonly occurs in shades of blue to gray, violet or indigo. It displays a visual property called pleochroism, which means that it can appear to be different colors as it shifts in the light. According to Norse legend, Viking explorers used thin pieces of Iolite as the worlds first polarizing lens to help them determine the exact location of the sun for navigation.