Entry
CommercialPrice index103.0▲ 0.8% qtr
Q1 2025Q2 2026
Example grade (e.g.)TanzaniaPale violetish blueHeated · SI clarity< 1 ct
Market band$170 to $230 / ct
The Gemius IndexTNZ
Tanzanite
Four market segments for tanzanite, Entry to Investor. Each shows its price index, market band and an example grade. Refreshed every quarter.
By market segment
Where a tanzanite lands depends on its origin, colour, clarity, treatment and size.
Mid
GoodPrice index109.0▲ 2.2% qtr
Q1 2025Q2 2026
Example grade (e.g.)TanzaniaVioletish blueVS clarity · Heated1 – 5 ct
Market band$510 to $690 / ct
Premium
Fine · HeadlinePrice index118.0▲ 4.0% qtr
Q1 2025Q2 2026
Example grade (e.g.)Tanzania MerelaniVivid violetish blue (AAA)VVS clarity · Heated5 – 10 ct
Market band$1,000 to $1,600 / ct
Investor
Extra-FinePrice index122.0▲ 4.7% qtr
Q1 2025Q2 2026
Example grade (e.g.)Tanzania MerelaniVivid violetish blue · UntreatedVVS clarity10 ct +
Market band$1,800+ / ct
Price index base 100 at Q1 2025. Market band is the per-carat range across the segment. Example grades are illustrative, not an offer to buy or sell. As of Q2 2026.
Other gems
See the market data for any other species we cover.
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