Natural Iolite Oval Cut 925 Pure Silver Ring (Certified)Product Description Natural Iolite Oval Cut Ring Iolite rings are loved for their deep violet blue color that can resemble sapphire or tanzanite at a much lower price. The most important things to look for are color saturation, cut quality, and protective settings because iolite has cleavage and can chip under hard impact. The best stones show a rich violet blue tone with good brilliance. Iolite is also strongly pleochroic, meaning it changes color