Tanzanite is a rare blue-violet gemstone found only in Tanzania, prized for its striking color and limited supply. This guide explains how to judge tanzanite quality, the best cuts and jewelry settings, and how to care for it.
Tanzanite is a variety of zoisite discovered in 1967 near Mount Kilimanjaro. Its signature blue-violet color, often compared to the finest sapphires, and its single source make it one of the rarer gemstones on the market.
| Factor | What to Look For |
|---|---|
| Color | Deep violet-blue with even saturation |
| Clarity | Eye clean or minor inclusions acceptable |
| Cut | Oval, cushion, and pear maximize color depth |
| Heating | Most tanzanite is heat treated to deepen blue |
Tanzanite scores 6.5 to 7 on the Mohs scale, so it needs gentle care. Avoid ultrasonic cleaners, harsh chemicals, and impact, and store it away from harder stones like diamonds. Clean with warm soapy water only.
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Get a Free Quote Chat on WhatsAppHigh-quality tanzanite is comparable to mid-range sapphire, but fine sapphires cost more. Tanzanite offers a vivid blue-violet at a more accessible price point.
With care, yes, but it is softer than sapphire and diamond. Reserve tanzanite rings for special occasions or choose a protective bezel setting for more frequent wear.
Almost all commercial tanzanite is heat treated to enhance its blue color. This treatment is stable and widely accepted; untreated stones are rare and cost more.