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."
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