Thieves went shopping for jewelry on Park Avenue, police said Saturday.

Three stealth burglars broke into Cellini Jewelers at Park and East 56th Street shortly after 3:30 a.m. and helped themselves to an undetermined amount of high-end merchandise, the NYPD said.

The terrible trio “broke the entry doors” of the building at 3:34 a.m. and then made their getaway in a gray or silver sedan, an NYPD spokeswoman said. The car sped off east on East 56th Street, the spokeswoman added.

High-end Cellini “favorites” include diamond petal earrings that go for $12,000 and a Pave diamond oval and bar yellow diamond gold cuff bracelet that runs $17,600, according to the store’s website. The shop also sells a Girard-Perregaux tourbillon watch that fetches $172,000.

Cellini’s was open for business Saturday morning. “We can’t say anything, we can’t make any comments, thank you,” said a woman employee who answered the phone.