Tiffany Bow Ribbon Engagement Ring in Platinum The Tiffany Bow Ribbon engagement ring—a stunning symbol of your love for one another—is elegantly feminine, with a round brilliant center diamond and sweeping loops of smaller yet scintillating diamonds set in platinum. Popular in 17th century France, bow and ribbon-shaped jewels were said to symbolize love and marriage. At Tiffany, we ethically source our diamonds. Integrity and social responsibility are at the core of our sourcing practices.