Describes the characteristics, method of identification and the market of ruby, sapphire, pink sapphire, yellow sapphire, green sapphire, colorless sapphire and star gem.

• 描述了红宝石、蓝宝石、粉蓝宝石、黄蓝宝石、绿蓝宝石、无色蓝宝石和星光宝石的特征、真伪鉴别方法及市场行情。