I know very little about this lovely necklace. I just know it is over 75 years old! Approximately 24" circumferance. There are beautiful dark blue beads (looks like Lapis) mounted on metal links. I could never find an opening link, so, just slid it over my head!! I include a photo of the underside where you can see the quality work on this necklace. I am guessing this was possibly made in Mexico.