Iolite 6mm Faceted Coin 15-16 Inch 60-70mm the mineral was named for

the mineral was named for French paleontologist Eugene Durmortier (1803-1873)

It may also contain rainbow to colored or sparkling inclusions

This lava rolled across the landscape

A manganese carbonate material of the Calcite group

Iolite 6mm Faceted Coin 15-16 Inch 60-70mm the mineral was named forIolite most commonly occurs in shades of blue 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.