Tourmaline
Tourmaline with Usambara effect; Chiblua mine; Mkushi area. Photo © Leo Klemm, http://www.lukusuziriver.com. Used with permission.
Article: What is the Usambara Effect In Gemstones?
Credit: http://www.lukusuziriver.com
Gemstone | Tourmaline |
Natural or man made | Natural |
Origin | Zambia |
Origin details | Chiblua mine, Mkushi area |
Gem State | Rough |
Color | Green |
Transparency | Translucent |
Photo phenomena | Usambara Effect |
Multi-color | Bi-color |