Tiki Mayan Golden Obsidian Earrings Mexico Sterling

Description

Mayan Tiki Golden Obsidian Earrings Carved Faces Heads Hecho En Mexico Sterling
I believe the Black material used on these earrings to be Golden Obsidian.  They appear to be solid black but when the light hits them just right you can see a gold sheen.  See Last photo for an example of this.
These earrings are marked on the backs and I believe them to say Hecho En Mexico 925.  There also appears to be some sort of makers mark that I cannot identify.
In vintage
USED/WORN
condition.  Nice pair of marked earrings.  Makers mark is worn some on the backs but can be seen in photos.  Earrings show wear from use and age in the form of some light scratches and tarnish to the silver.  Screw backs work fine.  One is crimped a bit more than the other.  Please review all photos and judge for yourself.  If you should have any questions feel free to ask prior to purchasing, thanks.