In order to tell whether a diamond was natural and not synthetic, you'd have to go to a professional gemmologist or demonologist for inspection, using a spectrometer or other tools to be able to determine that. But it would be very, very difficult, and the untrained eye really couldn't catch the difference.

为了辨别钻石是自然而非人工合成,你得去一位专业宝石专家那里进行检验,利用分光计或其他工具就能够确定。不过仅靠肉眼可能会非常非常困难,因为未经训练的眼睛很难分辨出这两者之间的差异。