Lauren Sánchez is showing what billionaire bridal style looks like with chic outfits and a ring estimated to be worth more than $6 million

Lauren Sánchez steps out in Venice on Friday. Yara Nardi/Reuters Jeff Bezos and Lauren Sánchez's wedding celebration is in full swing in Venice. Sánchez has worn an assortment of high-end gowns throughout the festivities. So far, the bride-to-be has defied expectations in vintage and…