Super Bowl XL - Wikipedia
What Super Bowl rings are made of, and how much they cost
Ouro Verde Quartz: History and Treatment - Gem Society
Super Bowl Rings: Not Going for the Gold — Steemit
How Much Is a Super Bowl Ring Worth? - TheStreet
Photos: All the Super Bowl rings
What's a historic Super Bowl ring worth? Heritage Auctions has 12 up for bid - Sports Collectors Digest
Super Bowl Rings: Behind the Bling
Super Bowl Rings: Behind the Bling
How much do the Super Bowl rings cost? What are they made of? - AS USA
Jamal Lewis' Super Bowl ring sells for $50,820 at auction - Sports Illustrated
Photos: All the Super Bowl rings
What Super Bowl rings are made of, and how much they cost
Evolution of Super Bowl Rings: History, Costs, Jewels & More Facts – WWD