One of a kind exotic 925 silver necklace with large faux pearl pendant

Vintage 925 silver necklace. Unique exotic style. The pendant has one large faux pearl and is stamped 925 on the back. Comes with 16" chain that is stamped 925 on the plate adjacent to the clasp. The pendant is 3 cm long (with bail). Both the chain and the pendant are slightly magnetic. Perhaps the metal is a lower grade silver with added magnetic metal. Or it could be real 92.5% silver, but with the rest 7.5% being stainless steel, which is highly magnetic. All vintage Canadian designer Bond Boyd sterling jewelry was made this way and all their pieces that I checked were slightly magnetic.