In “Timon of Athens,” Act 3, Scene 6, the Fourth Lord says:

One day he gives us diamonds, next dry stones.

In “The Merchant of Venice,” Act 3, Scene 1, Shylock exclaims,

A diamond gone, cost me two thousand ducats in Frankfort.

In “Macbeth,” Act 2, Scene 1, Banquo presents the King’s diamond with the words:

This diamond he greets your wife withal.

In “King Lear,” Act 4, Scene 3, the gentleman tells Kent:

You have seen

Sunshine and rain at once: her smiles and tears

Were like a better way: those happy smilets,