Tanzanite, a member of the zoisite mineral, is an exotic, velvety blue gem that occurs in a wide array of sizes and cuts. Despite its short history, the stone has made a name in the jewelry industry due to its rarity and striking color that varies according to cut. The smaller stones tend to have lighter tones and display more of the lavender or purple hue while the larger cuts feature deep vivid blue tones.
While tanzanite is known for the blue-purple hues, it’s actually a brownish crystal in its rough state. Rarely a pure blue, the vast majority of tanzanite stones in the market are heat treated to make the dull color turn to vivid blues with overtones of purple.
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