What similes does Romeo use to convey Juliet's beauty?

A simile is a figure of speech that compares two completely different things using the words "like" or "as." They are particularly useful in the language of love, where they can convey true depth of feeling. One such example occurs in act I, scene 5 of Romeo and Juliet, when Romeo uses a particularly striking simile to conveys Juliet's beauty. At that fateful ball, when he casts eyes on her for the very first time, he compares her to a beautiful jewel:

O, she doth teach the torches to burn bright!It seems she hangs upon the cheek of nightLike a rich jewel in an Ethiope's ear;Beauty too rich for use, for earth too dear! (Act I, Scene v).

Juliet's beauty is so bright that it provides a stark contrast to the darkness of night, in much the same way as a beautiful jewel hanging from an Ethiopian's ear. Ethiopians are black, and so Romeo is comparing their dark skin color with the night against which Juliet's jewel-like radiance shines.