Vintage Art Deco Onyx, Marcasite and Sterling Dangle retailer Drop Earrings

Vintage pair of restored Art Deco sterling drop earrings
Tear drop onyx center stones are 5/8" long by 1/4" wide
Many of the marcasites were missing and have been replace with new old stock stones
Marked 925 and what appears to be a markers mark M
These have been cleaned, but not polished to retain retailer the vintage patina on the sterling.
the last picture shows the earrings before I cleaned and replaced the missing stones.