Does diamonds and chocolates combined sound more like a wish list? This alluring combination is put together by Mervis Diamond Importers, a small chain of jewelry stores in the Washington, D.C., area, who are well known for gaining eyeballs by creating.

We have seen the world’s most expensive diamond-studded wedding cake worth $20 million, and now we have the world's first Fantasy Diamond Cupcake. Mervis Diamond Importers claim to be the first to create a diamond cupcake, which is festooned with...