Iolite is a beautiful gemstone known for its striking blue-violet color, which can change depending on the angle of light. This unique optical property is called pleochroism, making Iolite a favorite among gem enthusiasts. It is a variety of the mineral cordierite and is often used in jewelry, such as rings and necklaces. Iolite is primarily found in regions like Sri Lanka, India, and Tanzania. It has a hardness of 7 to 7.5 on the Mohs scale, making it relatively durable for everyday wear. Additionally, Iolite is sometimes referred to as "water sapphire" due to its color and appearance.