Scott Dave Navajo Sterling Silver Malachite Ring Size 7.75

Pre-owned Vintage Scott Dave Navajo Sterling Silver Malachite Ring Size 7.75 Malachite stones are dull (not shiny) Signed Sterling RB on the back of the ring face. The inside of the ring is signed TERLIN (should be Sterling but rubbed of due to wear) SD. Silver is scratched and tarnished or oxidized. I was not able to remove the tarnish or oxidation, you might not be able to remove it either. Face of ring is almost 1.5 inches in length Comes from a smoke free home