USS Nacre
From Star Trek: Theurgy Wiki
The USS Nacre was a 24th century Federation starship operated by Starfleet.
Lieutenant (junior grade) ThanIda zh'Wann served aboard the Nacre as a Security Officer from 2376 to 2379 before being promoted and assigned to the USS Theurgy.
(It has not yet been revealed what class of starship the USS Nacre was.)