The Deck is now DIAMONDS (deck challenge)

Got an interesting challenge for you. Make a deck, out of any cards in magic, that has SOMETHING to do for diamonds.

Rules: Most of the cards must have
-The Word Diamond in it
-Talks about Diamonds or other Gems
or
-Has a picture of Diamonds/other Gems on the card

Lands are excluded, but bonus points for special lands that go with the theme.

And, the deck must be atleast somewhat effective. Not looking for a competitive deck, but it must at least have a chance at winning games.

This is merely a fun deck challenge, since my friends have kept making constant Old Spice "The -blank- is now DIAMONDS" jokes.