Zoisite (Var. Tanzanite), 8.5 x 4.0 x 2.0 cm, Merelani Hills (Mererani), Lelatema Mts, Arusha Region, Tanzania. © Rob Lavinsky, www.iRocks.com. Used with permission.
Blue Birefringence Tanzanite (Zoisite) Specimen from Tanzania
Zoisite (Var. Tanzanite), 8.5 x 4.0 x 2.0 cm, Merelani Hills (Mererani), Lelatema Mts, Arusha Region, Tanzania. © Rob Lavinsky, www.iRocks.com. Used with permission.
Article: What is Gemstone Birefringence?
Credit: www.iRocks.com
| Gemstone | Tanzanite (Zoisite), Zoisite |
| Natural or man made | Natural |
| Origin | Tanzania |
| Origin details | Merelani Hills (Mererani), Lelatema Mts, Arusha Region |
| Height | 85 |
| Width | 40 |
| Depth | 20 |
| Gem State | Specimen |
| Color | Blue |
| Transparency | Transparent |
| Photo phenomena | Birefringence |
| Photo pleochroism | Trichroic (3 colors) |