iolite


 Iolite ranges from light violet to deep blue, with some stones showing a color shift depending on the angle of light. This can result in shades of blue, violet, or grayish-blue. Iolite is highly pleochroic, meaning it can exhibit different colors when viewed from different angles. This is due to its crystal structure, which causes the light to be absorbed differently. Iolite can be transparent to translucent, with high-quality stones being clear and vivid in color. On the Mohs scale, iolite has a hardness of 7-7.5, making it suitable for various types of jewelry.