I think that this fab pendant and chain comes from the 1960s.
Two layers of stainless steel shapes, and then a carved piece of beautiful golden mother of pearl on top.
The bottom diamond shape of stainless steel is gently curved at the sides.
On a stainless steel chain which is just over 26" long and has no clasp so pops straight over your head.
Condition is good with some minor scratches but nothing that detracts.