Vintage Judith Jack Marcasite seed pearls Sterling necklace

Vintage Judith Jack necklace of 3 Marcasite encrusted flowers with heart shaped petals strung on a twist wire chain of small seed pearls with a lobster clasp. Clasp is marked Sterling as shown. I can’t find more markings on piece. I suspect flowers are Sterling as well because I spot polished the side of one with my cloth. Beautiful, sweet, dainty and delicate. Measurement in photos.