The new rock on Taylor Swift’s finger was designed by Kindred Lubeck, a representative for the pop star confirmed Tuesday.

The vintage-inspired diamond is an old mine brilliant cut, Tree Paine, Swift’s publicist, said Tuesday. She provided no further details after Swift and Travis Kelce jointly announced their engagement earlier in the day.

Lubeck, who is based in New York and operates Artifex Fine Jewelry, in the daughter of Jay Lubeck, a well-known gold smith in Neptune Beach, Florida. Swift showed off her ring in a carousel of five photos accompanying the engagement news as the couple stood in a garden. Swift wore a striped Ralph Lauren dress and her go-to Cartier diamond-encrusted watch on left wrist.

Lubeck is a goldsmith who specializes in hand engraving. She also collects vintage jewelry, according to her bio on Artifex Fine Jewelry’s website. Old mine brilliant cuts are square-shaped with rounded corners. Swift’s is set in yellow gold.

Such diamonds usually have 58 large facets and the style dates to the 18th century. The bulky nature of the cut was intended to sparkle by candlelight.

Swift and her football fiance from the Kansas City Chiefs have enthralled millions around the world, especially her Swiftie fan base, since they began dating. Their relationship was documented in countless shots of Swift celebrating at Chiefs games and fan videos of Kelce dancing along at Swift’s Eras concert tour as it traveled the globe.