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Tanzanite
Tanzanite is valued for its blue to violet appearance and distinctive natural character. Quality and value depend on color, clarity, cut, size, origin, treatment, and documentation.
- Mineral family
- Zoisite
- Chemistry
- Ca2Al3(SiO4)3(OH)
- Mohs hardness
- 6-7
- Colors
- Blue to violet
- Common origins
- Tanzania
- Wearability
- Best in protected settings and requires careful wear.
Treatments and synthetics
Heat treatment is routine.
Care guidance
Use only a soft damp cloth and avoid heat, chemicals, impact, ultrasonic, and steam cleaning.
Buyer checklist
Confirm classification, treatment, dimensions, weight, origin claims, return terms, and any laboratory report before purchase.