Poised between lush blue, vibrant violet, and rich purple, exotic tanzanite is found in only one place on earth, near majestic Mount Kilimanjaro.
- Mineral: Zoisite
- Chemistry: Ca2Al3(SiO4)3(OH)
- Color: Violet blue to bluish violet to violet purple
- Refractive Index: 1.691 to 1.700
- Birefringence: 0.008 to 0.013
- Specific Gravity: 3.35
- Mohs Hardness: 6 to 7