The statement earrings that capped Taylor Swift’s midnight-blue two-piece Roberto Cavalli ensemble at the 2023 Grammy Awards are soon going to be available to one lucky, deep-pocketed buyer.

Created by jeweler-to-the-stars Lorraine Schwartz, the pair of kite-shaped baubles worn by Swift on Grammy Night are to be included in an upcoming auction from Joopiter, the digital-first auction house founded last year by Pharrell Williams.

The girandole-style, four-panel earrings are crafted of more than 136 carats of natural purple sapphires, paraiba tourmalines and diamonds, set in 18-karat white gold and were said to be valued at close to $3 million.

They are part of Joopiter’s first auction dedicated to high jewelry. Titled A Journey Through Gems with Schwartz, the sale will open for bidding worldwide March 17 at joopiter.com. It will feature “a selection of the world’s rarest stones and iconic, one-of-a-kind creations commissioned throughout Schwartz’s legendary career,” according to...