Green Malachite Bead Necklace With Sterling Silver

Vintage necklace with large solid green malachite beads. They are separated by hand made sterling silver beads. Barrel clasp is not sterling. 24" long. Center bead is 1 1/8" long. There is a gap in the beads at the back. 

I have two of these with different size beads. They are listed separately. You can see them together in the last photo.