Engagement Rings in St. Louis - Plaza Frontenac

For more than a century, our artisans have handcrafted the world’s finest diamonds and set them in iconic Tiffany & Co. engagement rings and wedding bands. We offer a triple excellent cut—the highest grade in the industry—on all round brilliant and Tiffany True® diamonds.

As a pioneer in responsible sourcing, we don’t just adhere to industry standards—we lead by example. In 2020, we became the first global luxury jeweler to disclose the countries where our newly sourced, individually registered diamonds of .18 carats and larger are sourced, cut, polished, graded and set.