The Diamond Oak is a dealer of preowned fine jewelry, engagement rings, antique pieces, vintage collection, and made-to-order custom pieces. Whenever youāre ready to begin the journey to find the perfect piece of jewelry, whether branded or non-branded, to mark your most amazing moments, weāre here to see you through with the most spectacular service and selection. Come and visit us anytime at The Diamond Oak in the heart of New York Cityās Diamond District or connect with us online from anywhere. Either way, we assure you when it comes to fine jewelry, youāre in the very best of hands.