Maybe everyone heard of turtle grain stone, function and characteristics of did not understand it.

也许大家都听过龟纹石，却不明白它的作用和特征。

youdao

This is a kind of turtle grain stone, which are found in anhui.

这是属于龟纹石的一种种类，产于安徽。

youdao

This is a kind of turtle grain stone, which are found in anhui.

这是属于龟纹石的一种种类，产于安徽。

youdao