Tanzanite is a blue-violet gemstone that is a variety of the mineral zoisite. Discovered in 1967 in Tanzania, it is prized for its striking color, which can range from deep blue to purplish hues. Tanzanite is often used in jewelry, including rings, necklaces, and earrings, and is considered a birthstone for December. This gemstone is unique because it is only found in a small area near Mount Kilimanjaro, making it quite rare. Tanzanite is typically heat-treated to enhance its color, and it is softer than other gemstones, requiring careful handling to avoid scratches and damage.