However, only a few people are aware that the Justice League actor was in a relationship with Jennifer Lopez before he got engaged to Jennifer Garner. However, the couple called off their engagement a couple of years later and Affleck eventually went on to marry Garner.       The diamond engagement ring that Ben Affleck gifted to Jennifer Garner when he proposed to her was a 4.5-carat cushion-cut diamond ring with baguette side stones. Just a few years ago, he gifted another breathtaking 11-carat diamond engagement ring to Garner while they were vacationing in Paris. The super-sparkly and massive ring was rumored to be a pre-anniversary gift. Ben Affleck proposed to JLo back in the year 2001 by gifting a stunning 6.1-carat pink diamond engagement ring to her. The cost of the Jennifer Lopez pink diamond engagement ring is estimated to be around 1.2 million dollars. In fact, the diamond engagement ring that Affleck gifted to JLo is considered to be one of the best celebrity diamond rings ever. However, Jennifer Lopez returned the diamond ring after they split up.