Jewelry designer Dara Dubinet has designed a $27,000 black Chinese agate rock ring for Britney Spears to wear to the Grammy Awards in February.

Dubinet started work on the huge gem after she spotted Spears wearing a Tourmaline ring she had created and sent to the pop star when she appeared on Good Morning America on her 27th birthday in December.

The designer tells Life & Style magazine she was told that Britney “loved” her birthday gift. “She’s worn it several times, She says it has a positive energy, and it just makes her smile.”