Tiffany & Co. named this striking blue-violet variety of zoisite tanzanite in honor of its country of origin—Tanzania—where it was first unearthed in 1967.

Its single-source origin—found exclusively in the Merelani Hills of northern Tanzania—makes it one of the most geographically rare gemstones on Earth. Many gemologists believe the deposit may be depleted within the next decade or two, making tanzanite increasingly precious and collectible.

Tanzanite’s color ranges from soft lilac to rich violet and velvety blue, often revealing flashes of burgundy or indigo depending on the light. This phenomenon, known as pleochroism, allows a well-cut tanzanite to shift between three distinct colors, adding to its mystique and allure.

Though slightly softer than other precious stones, tanzanite remains suitable for everyday wear with mindful care.

Despite its relatively recent discovery, tanzanite quickly became a favorite among designers and collectors alike—for offering the drama of sapphire, with a softer, more romantic glow.