amethyst is 半寶石,deeper color , the clearer ,the better.
所有跟帖:
• 半寶不是寶石,水晶絕對不能燒,會加重裂隙 -宗闋- ♀ (0 bytes) () 07/17/2016 postreply 15:11:18
• heat treat : common use mothod for inceasing the color of gem. -西風-西風- ♀ (0 bytes) () 07/17/2016 postreply 17:09:08