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Tanzanite
Tanzanite
Tanzanite
Tanzanite
Tanzanite

Tanzanite

by Rubyfair

📏 7.0 × 6.0 mm

⚖️ 1.31 ct

🌱 Natural tanzanite

Rubyfair, Tanzania

Cut and finished in Tanzania

Sourced through our partner, Rubyfair

🤝 Responsibly sourced through Nineteen48's trusted supply chain

A really stunning gem. A deep blue tanzanite from Tanzania.

SKU TZ-TAN-000134
£1,560.00 - £1,560.00
£1,560.00
£1,560.00 - £1,560.00
£1,560.00
Only one available

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Tanzanite Facet Oval Blue

Tanzanite, a deep blue to violet colour gemstone found exclusively in Tanzania.

Nineteen48 has responsibly sourced tanzanites from a small-scale mine in northern Tanzania.

The Rubyfair project was a community-run, artisanal mine located near the famous town of Mahenge in south-central Tanzania. The mine ran for a number of years and produced a good quantity of ruby and spinel. It has now ceased operation.

Gemmological Info

Composition: Ca₂Al₃[Si₂O₇][SiO₄]O(OH) (calcium aluminium silicate)
Crystal system: Orthorhombic
Hardness: 6–7
Cleavage: Perfect
Fracture: Uneven
Lustre: Vitreous
Specific Gravity (SG): 3.35
Refractive Index (RI): 1.691–1.700
Birefringence: 0.008–0.009
Optical nature: Biaxial (+)
Dispersion: 0.019