Iolite 6x8mm Triangle Cut Faceted Rice Bead - 15-16 Inch Shape_Drop Many stones in the Russian

Many stones in the Russian crown jewels from the 17th century which were thought to be rubies are actually red Tourmaline

aluminum oxide and other metal oxides

" is like the deep blue evening skies often seen above deserts and winter landscapes

Botswana Agate was formed nearly 187 million years ago by lava flowing in waves from long faults in the earth

It is a white granite with dark gray mottling that also exhibits blue or green spots

Iolite 6x8mm Triangle Cut Faceted Rice Bead - 15-16 Inch Shape_Drop Many stones in the RussianIolite 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.