skiro
1 Answer
Yvonne57
Green tourmaline is often heated to lighten color in over saturated gems, like those commonly seen in Brazil. Other tourmalines are heated to alter one of the dichroic colors.
from: http://www.moregems.com/heat_treatment_of_gems
| 13 years ago. Rating: 0 | |
Top contributors in Uncategorized category
Unanswered Questions
Nhacai fun88ex
Answers: 0
Views: 2
Rating: 0
TAKABET
Answers: 0
Views: 9
Rating: 0
kwinasia1
Answers: 0
Views: 8
Rating: 0
Nohu90 - Cổng Game Nổ Hũ Uy Tín
Answers: 0
Views: 8
Rating: 0
Nhacai fun88mo
Answers: 0
Views: 8
Rating: 0
Dai ly 33win
Answers: 0
Views: 7
Rating: 0
https://hello88vn.us.com/
Answers: 0
Views: 6
Rating: 0
au88cheap
> More questions...
Answers: 0
Views: 9
Rating: 0