Famous for its mesmerizing trichroism—showing shifting shades of deep blue, vibrant violet, and rich purple depending on the angle of the light—tanzanite is one of the world’s rarest exotic gemstones. Discovered in 1967 near Mount Kilimanjaro, it is a variety of the mineral zoisite and is mined exclusively within a tiny, four-square-kilometer area in Tanzania. Because of this incredibly limited geographic footprint, it is widely considered a single-generation gem, making it vastly scarcer than diamonds. Celebrated for its modern elegance, unique color depth, and spiritual associations with high-vibrational energy and transformation, this spectacular stone is a true collector’s treasure.