Zoisite is a mineral belonging to the epidote group, primarily composed of calcium aluminum silicate. It typically forms in metamorphic rocks and is known for its vibrant colors, which can range from green to blue, purple, or even colorless. The mineral is often found in regions with high-pressure and high-temperature conditions, such as Alps and Tanzania. One of the most notable varieties of zoisite is tanzanite, which is prized for its striking blue and violet hues. This gemstone is highly sought after in the jewelry market due to its unique color and rarity. Zoisite can also exhibit pleochroism, displaying different colors when viewed from different angles.