Tanzanite is a blue-violet gemstone that is a variety of the mineral zoisite. Discovered in Tanzania in 1967, it quickly gained popularity due to its striking color and rarity. The gemstone is primarily found in a small area near Mount Kilimanjaro, making it one of the few gemstones that is sourced from a single location. Tanzanite is often used in jewelry, such as rings and necklaces, and is valued for its unique color, which can change depending on the angle of light. It is also the birthstone for December, symbolizing transformation and healing.