The 'Bodak Yellow' hitmaker had removed the piece of jewellery when she split from her rapper husband Offset.
So, if the piece of jewellery is anything to go by, the couple could be hinting at a "happily ever after".
This comes after the pair were seen out together at the Ignite Angels and Devils Pre-Valentine's Day party in Bel Air, California.
Cardi had previously spoken out about why she refused to go to marriage counselling with Offset, even though they were trying to work things out for the sake of their six-month-old baby daughter Kulture.
She said: "I decided on my own. Nobody makes my decisions about my life but me. There's no counsellor or nothing that could make me change my mind."

UAE National Orchestra to celebrate spirit and pride in shared experience
Fans step inside TV history as ‘Brady Bunch’ house becomes immersive experience
Billie Eilish and James Cameron team up for immersive and intimate tour film
Lively, Baldoni lawyers spar over damages ahead of 'It Ends With Us' trial
Taylor Swift files to trademark her voice, likeness to ward off AI deepfakes
