amethyst is 半宝石,deeper color , the clearer ,the better.
所有跟帖:
• 半宝不是宝石,水晶绝对不能烧,会加重裂隙 -宗阕- ♀ (0 bytes) () 07/17/2016 postreply 15:11:18
• heat treat : common use mothod for inceasing the color of gem. -西风-西风- ♀ (0 bytes) () 07/17/2016 postreply 17:09:08