Bloody Iolite 10mm Round A Grade - 15-16 Inch Orange Druzy Agate Peter the Great set up

Peter the Great set up Russia's first spa in Karelia to make use of the water purifying properties of shungite

It is frequently fluorescent under ultraviolet light

It can range in color from pale pink to deep rose or even rusty red tones depending on the concentration of Manganese

or subject it to pressure

It also serves as the Mohs hardness scale index mineral for a hardness of 8

Bloody Iolite 10mm Round A Grade - 15-16 Inch Orange Druzy Agate Peter the Great set upIolite 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.