McDonald's is celebrating the 50th anniversary of the Big Mac, having tapped fine jewelry designer Nadine Ghosn to create a one-of-a-kind ring to commemorate the occasion. Dubbed the Bling Mac, the accessory is ultimately designed to honor the three Big Mac sizes: the Grand Big Mac, Big Mac, and Mac Jr.

The 18K gold Bling Mac is valued at $12,500 USD, featuring seven individual tiers of diamonds and gems to represent the ingredients of the Big Mac. For example, orange sapphires point to the burger's special sauce.

You in turn have a chance to win the luxe Bling Mac ring. To enter, profess your love to Mac sandwiches on Twitter by writing vows February 7 through February 14 using #BlingMacContest and then tagging @McDonalds. The jewelry will be awarded to the "most witty, comedic, and romantic tweet."

Now be sure to check out some of the weirdest fast food chain merch out there.

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