Minnesota's Favorite Engagement Ring Store! Wedding Day Diamonds has revolutionized engagement ring shopping! We have the largest selection of rings in America. Thousands of unique, one-of-a-kind styles, custom designed just for you. With more and more thrilled customers every day, we’ve grown to 9 MN locations, including stores in St. Cloud and Richfield. We are the Twin Cities’ official headquarters for engagement rings and the premiere choice for selling your unwanted gold and diamonds.