VTG Large Oval Beads Set Of 6 Mother Of Pearl Jade Green Silver Jewelry Making

This is a set of 6 vintage / antique large oval beads for jewelry making. 4 large 2 smaller From the back it looks like mother of pearl shell with jade color glass overlay with a Diamond shape cut to the glass part. The beads are set in a silver tone antiqued metal. There looks like there’s a bit of copper color showing through on the silver part on the under side (see pics) Each bead has 4 holes to string the chain or jewelry findings through, 2 on each side evenly spaced (see pics)