Abstract: The culture of ornamental stones have been developed, and the ornamental stones have not been limited to the ancient "Five Famous Stones" and "Three Famous Jades" yet. There are sorts of ornamental stones in the markets, but different people have different standards to appraise ornamental stones. In this paper, the keys of appraising standard of the ornamental stones of mineral crystal are studied. And preliminary analysis on the ornamental stones of jade are made.