璞玉浑金

Explanation: Parable quality of natural beauty, unadorned. Many people used to describe the quality of simple goodness. 　　Usage: Joint type; as object; describe the quality of simple human kindness 　　Source: Southern Song Liu Yiqing "Shi reward reputation": "Mountain Giant Rong source projects such as the unadorned beauty, everyone Chin their treasure, MO known his tools." 　　Examples: Following the extraordinary special effect of Ganoderma lucidum, muddy good gold diamonds in the rough of its browser. (Qing xian "Do Lai Yunzhi the same year," Poetry) Thesaurus:  uncarved jade and unrefined gold, Hun Kim white jade