Zoisite is a mineral belonging to the epidote group, primarily composed of calcium, aluminum, and silicate. It typically forms in metamorphic rocks and is known for its distinctive green color, although it can also appear in shades of blue, brown, or gray. The crystal structure of zoisite is monoclinic, and it often exhibits a glassy luster. One of the most notable varieties of zoisite is tanzanite, which is prized for its vibrant blue and violet hues. Discovered in Tanzania, tanzanite has become a popular gemstone in jewelry. Zoisite is also used in some decorative items and as a collector's mineral due to its unique colors and formations.