Iolite 6mm Round A Grade - 15-16 Inch gemstone-pendant It forms when Quartz and

It forms when Quartz and Feldspar crystallize in radial aggregates within other silica to rich stones

where the stones are thought to have been originally found

ranges in color from blue-green to green

Calcite is the principal constituent of limestone and marble

increasing growth

Iolite 6mm Round A Grade - 15-16 Inch gemstone-pendant It forms when Quartz andIolite 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.