Natural Iolite 4.70 caratNatural iolite is a beautiful, transparent gemstone that comes in shades ranging from deep violet blue to light blue gray, resembling sapphire in its color but with a unique, subtle pleochroism (color shift) effect. This means it can show different colors from different anglesoften a blend of blue, gray, and a hint of yellow or brown. Its name derives from the Greek word ios, meaning violet. Iolite, also known as cordierite in mineralogy, has a Mohs