Tiffany & Co. stores have re-opened in your area! We continue to offer complimentary shipping for online orders. Learn more on the Tiffany's website. Since 1837, Tiffany & Co. has been the world's premier jeweler and leader in sustainable luxury. Explore our collections of iconic engagement rings, cherished gifts and visionary jewelry designs, all crafted from the finest and responsibly sourced materials. Shop for engagement rings, jewelry for men and women, watches, and timeless gifts in Walnut Creek, CA. .