Vintage Sterling Silver Necklace with Rhinestone Pendant, B & K, 18 inches, Fine and Dainty

Pretty and dainty sterling silver necklace is 18 inches total length. Marked 'B&K Sterling' on the clasp.
Small pendant with clear glass stone. The pendant and it's loop are about 3/8 of an inch. Pendant is unmarked, it may not have been original to this chain.
The necklace is very good to excellent, there is a knot in the chain near the end. The pendant has some light wear.