Iolite 7x9-8x10mm Pebble A Grade - 15-16-Inch tucson2026-PEBCHP1 Turquoise is one of the

Turquoise is one of the oldest known stones in human history

It is also one of the hardest

It forms over long periods as mineral-rich water moves through aluminous rock

and short prismatic crystals

Iolite 7x9-8x10mm Pebble A Grade - 15-16-Inch tucson2026-PEBCHP1 Turquoise is one of theIolite 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.