Vintage Southwest Tribal Lot of 16 Single earrings or stones + 3 pr. Earrings

Description

This is from my mother's collection.  Mom bought Native American jewelry from the 60's forward, slowed down in the 90's, but never completely stopped until she couldn't get out anymore.  She also almost never kept receipts.  As a result all I know about the jewelry is what I've learned from my own research, but have no idea where or when or from whom she bought any of it, except that she picked up most of these items on trips to Albuquerque, Santa Fe, and Taos.
Here are some odds and ends of Southwestern jewelry, 16 singletons or parts of earrings, and three matched pairs.  Some are marked sterling, some are silver but not marked, and the Kokopelli earring is Hallmarked "HC".  There is one really interesting brass colored screw-back drop earring with an Egyptian theme that may be quite old and not Southwestern at all--see last photo.  Please see all photos to judge for yourself what these pieces are, and what they're worth.
If you have any questions, email me.