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