A “butterfly wing” emerald generally has a delicate interruption of light filtering into the crystal, this effect gives to the gem a smooth, velvety hue with spread light shades due to internal microscopic inclusions.
好东西啊,这颗大概多少
涨知识了
宝石的晶体的因素，加上打磨师父的精彩工艺，形成了两边对等的角度所产生的视觉效果
看到上面大神解释涨姿势啊
牛掰
