TANZANITE

MERELANI

Tanzanite has only one source: the hills of Merelani in northern Tanzania.

1967

Masai tribesman Ali Juuyawatu is credited with finding the first tanzanite crystal.

PLEOCHROIC

Tilt tanzanite and you’ll see three distinct colors in three crystal directions.

FACTS

• 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

source:gia.edu