What does this phrase mean in Chinese “珉，石之美玉者”? Seems to be a line of poetry from ancient times?
The sentence seems to be the explanation of 珉 in 说文解字.


  珉,石之美者。


It could be literally translated as 珉, the elegant one (the beauty) of the stones; 珉's original meaning is 似玉的美石 (jade-like stone).