The meaning of Chaohu stone is annotated and the features of the stone and its formation mechanism are analysed. The value of the stone resources is proposed.

• 本文介绍了扩散蓝宝石的形成机制、扩散蓝宝石的特征，着重阐述了扩散蓝宝石的鉴别，最后对照天然优质蓝宝石对扩散蓝宝石进行了评价。