Iolite 4mm Faceted Coin 15-16 Inch Mexican mined since 4000 BCE

mined since 4000 BCE

The blue color

limestone and copper

is a deep blue metamorphic rock used as a semi-precious stone that has been prized since antiquity for its intense color

and Magtalisai

Iolite 4mm Faceted Coin 15-16 Inch Mexican mined since 4000 BCEIolite 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.