Very rare cordierite with cat’s eye effect (moving light line on the surface of the cut stone). This sapphire blue (Mg,Fe)2Al4Si5O18 cordierite has a distinctive steel hue that enhances the cat’s eye effect. The mineral is also known as cordierite, iolite, or water sapphire. The offered piece comes from the state of Espirito Santo in Brazil; the stone is cut into a regular cabochon. This beautiful cordierite is suitable for both jewelry and gemstone collections.