Note: This is black jadeite jade(wuji. 乌鸡). This is a special kind of Jade called "black-bone chicken". People believe this kind of jade can ward off evil spirits and attract wealth. 

No crack. No hairline. The surface of the yellow jade is not smooth. May not be perfectly even in width and thickness but almost not noticeable. 

1: Size 7 1/4

No crack. No hairline. The surface of the yellow jade is not smooth.