Philadelphia Diamond Company engagement rings are not manufactured—they’re engineered. Handmade. Designed. Crafted. Not by machines on an assembly line but by people. Diamond graders, cutters, setters and polishers work closely with our designer to bring your vision to life. Many of whom come from generations of jewelers and artisans. Our diamonds are G.I.A. certified and selected for the best quality. Therefore, no two rings are the same. Just as no two love stories are the same.