Tanzanite is one of the most remarkable gemstone stories of the modern era: it is found in only one place on Earth, a small area near Mount Kilimanjaro in Tanzania. That single source, combined with a striking violet-blue color, makes tanzanite both beautiful and closely watched by collectors. Prices range from about $100/ct for small, lighter stones to $1,200/ct for large, top-color vivid blues, with speculation that prices could rise as the deposit is mined out.
GemstoneAI market index, updated November 9, 2026
$477 per carat
A market-wide average across qualities and sizes, refreshed weekly. What your tanzanite is worth depends on its carat, color, clarity, cut, treatment and origin.
See the live tanzanite marketTanzanite Price Chart
| Quality | Price/Carat | Notes |
|---|---|---|
| Commercial (light, under 1ct) | $100–$200 | Fashion jewelry grade |
| Good (medium color, 1-3ct) | $200–$500 | Fine jewelry grade |
| Fine (vivid, 3-5ct) | $500–$800 | Collector quality |
| Exceptional (vivid, 5ct+) | $800–$1,200 | Investment grade |
Color Grading and Price Tiers
Tanzanite's value is overwhelmingly determined by color intensity. The most desirable stones show a vivid, saturated violet-blue to blue-violet color, sometimes described as 'AAA' in the trade (though this isn't an official grading scale). Lighter stones with visible lavender or gray tones trade at significant discounts. The trichroic nature of tanzanite, showing blue, violet, and burgundy from different angles, is most pronounced in larger, more saturated stones. Nearly all tanzanites are heat-treated from their natural brownish-violet to blue. This is universally accepted and does not affect pricing.
Size Matters: Tanzanite Price by Carat
Tanzanite shows significant price jumps at key size thresholds. Small tanzanites (under 1 carat) with light to medium color are relatively affordable at $100-$200/ct. At 1-3 carats with good color, prices climb to $200-$500/ct. At 3-5 carats with vivid color, expect $500-$800/ct. Exceptional stones over 5 carats with top color reach $800-$1,200/ct. Unlike rubies and sapphires, large tanzanites are not prohibitively rare, making them an accessible entry point to collecting colored gemstones.
- Under 1ct, light-medium color: $100–$200/ct
- 1–3ct, good color: $200–$500/ct
- 3–5ct, vivid color: $500–$800/ct
- 5ct+, exceptional vivid: $800–$1,200/ct
The Single-Source Premium
Tanzanite is found exclusively in a 4km x 2km area in the Merelani Hills of Tanzania, while diamonds are mined on several continents. Geologists estimate that existing deposits could be depleted within 20-30 years at current mining rates. This scarcity narrative supports tanzanite's investment thesis, though actual prices depend on market demand and alternative discoveries (none have been found to date). GemstoneAI can help you assess tanzanite quality before purchase.
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