Robert Christy, comp. Proverbs, Maxims and Phrases of All Ages. 1887.

Diamond

A barley corn is better than a diamond to a cock.

A diamond is not so precious as a tooth.Don Quixote.

A diamond is valuable though it lie on a dunghill.

A diamond with a flaw is preferable to a common stone without any imperfection.Chinese.

A fine diamond may be ill set.

Diamonds cut diamonds.

Diamonds dart their brightest lustre
From the palsy shaken head.Wordsworth.

If a diamond be thrown into the mire, it is a diamond still.Turkish.