The culet of the gemstone was slightly chipped.

宝石的底面有点破损。

A well-cut diamond has a perfectly symmetrical culet.

切工良好的钻石有一个完美对称的底面。

The jeweler carefully examined the culet of the diamond.

珠宝商仔细检查了钻石的底面。

When appraising a diamond, the culet is one of the features to inspect.

在评估钻石时，底面是需要检查的特征之一。

The culet is an important aspect in determining a diamond's brilliance.

底面是决定钻石辉度的重要方面。