Jasper Heart Bead Necklace with Sterling Silver Clasp and Charm

Vintage necklace with 23 carved heart beads of various types of jasper. The toggle clasp is sterling silver and heart shaped with a scallop shell charm. The clasp is hallmarked, but I cannot read it. Marked 925. Measures 18" long by 1" wide. I found a couple of small chips in the stones. Weight: 78 grams.