The Toronto Raptors 2019 NBA Championship Ring made by the skilled craftsman at Baron Rings holds that record. With over 14 carats and 650 individual diamonds, this ring is one of the most valuable but what technically makes it the most valuable is having the largest single diamond on a championship ring history at 1.25 carat diamond located in the top of the Larry O'Brien trophy. This single diamond is a Canadian mined diamond and the value alone is easily worth more than 10 carats of small diamonds seen throughout most championship rings.