pokerface
Brilliant_Rock
- Joined
- Sep 12, 2011
- Messages
- 892
I am hoping to start a thread on gemstone enhancements and when these enhancements became routine. That way, if you have a piece which is known to be from a certain era, you could know that x treatment hadn't been invented yet. Can anyone tell me when topaz first started being irradiated, for example? Thank you.