the “very sentimental” sparkler’s still a symbolic nod to Swift’s and Kelce’s relationship: The opal is the NFL star’s birthstone, while blue topaz is one of the musician’s.

The gemstones hold meaning outside of the two stars’ birth months, too; “Opal is said to represent hope and purity,” Bulinski tells us, while blue topaz is “said to help channel your inner wisdom.”

The gem expert says the opal in Swift’s ring could be as large as 20 carats, putting the price of the custom piece in the range of $10,000.Swift’s new jewel could be worth much more. “The center stone on Taylor’s ring is massive and looks to be 15 carats. A high-quality opal of that size is incredibly rare. I’d estimate it at around $175,000, if not more,” he tells us.

“Since ancient times, opals have symbolized good luck, fortune, and power — which seems to be particularly fitting for Taylor Swift,” he continued.“My favorite stone is an opal because when I was bullied in school, my mom used to take me to T.J. Maxx after school to look at the opal jewelry.”

Continued the star at the time, “I thought opals were so beautiful, and somehow it made me feel better. We never bought them, just looked.”