Nepalese brooch/pin with turquoise/coral/glass

This is a brooch/pin from a family collection. The brooch is made from rough-cut metal, presumably brass, set with roughly cut turquoise stones, green glass and coral-coloured glass. The stones are set in some kind of resin in brass. There is one perfectly spherical turquoise bead which I think is glass - I had originally thought that someone had replaced a missing stone with a more modern one, but I have since seen several similar brooches, and all of them have one or more of these turquoise beads in them!

The seated figure has a carved face, and has two tiny red glass stones on either side of the brass neck decoration, and an archway of coral-coloured glass chips on either side of the body.
The brooch measures 2" in diameter, and has "NEPAL" etched into the back. The pin is a simple "C" clasp. It's very naive but unusual to me!

This probably belonged to my grandmother - her husband was in the merchant navy in the 1920s and '30s, Other examples I've seen claim to be from the early 1900s so that would fit.