Greenie
Addicted to bling
- Joined
- Aug 2, 2009
- Messages
- 190
Just been watching James Russell doing the Tanzanite show. He said only 1%of the tanzanite which comes out of the mine is AAA grade. Now I always thought, maybe wrongly it seems, that it's the amount of heat treatment applied to the gem which determines the intensity of colour and the grading. Is this not the case, and is James correct in what he says - does it come straight out of the mine like this?