What makes tanzanite so mesmerizing? Tanzanite is far more rare than other popular gems like sapphires and rubies, making them all the more special. These stunning, deep blue gems are found only in Tanzania, where they are mined—with care, of course. Don’t let the bright blues fool you: Tanzanite is actually a violet-blue color with occasional flashes of red and orange. Each gem comes unique and unaltered from its native land to produce a beautifully rich hue.