Native American Sterling Silver 925 LOT Turquoise earrings rings vintage Jewelry

Some are modern while some are vintage. Let's start off with the pendant this is a interesting piece the base at the bottom has been tested several times and doesn't seem to be solid sterling, however the upper area has been tested with silver & 18k solution (Please see photos & gives out milky white on the 18k & red on the silver) the metal work on stamping is very beautiful and there are no markings that I can see on this piece. I'm not sure if this was artisan piece that was custom or if it was something entirely different before, the pendant inside doesn't seem to be pure natural turquoise either however that can be replaced, a few teeth are missing that's the only thing careful removal is recommended. If someone is able to make out what exactly this is that'd be great actually, I've been holding on to this guy for about 10 years now.

When removing the pendant there are scratch marks from testing from another person who must have owned it before, I haven't tested that section due to it being scratched. The base has a very slight pull on a magnet but on the area where it was tested for sterling doesn't. Alpaca silver I'm assuming earrings?

(These have been tested and are not sterling) Still beautiful regardless. Small turquoise stone & black onyx rings both stamped 925 (Unsized).

A carved shell necklace with Heishi beads & unsure of the brown beads on it, could be brass or copper? The pendant sits at 2in from top to bottom & just a tiny bit shy of 2in at it's widest point. The carved necklace from top to bottom sits at 11in from top to bottom. The price will be at BIN or best offer as I have no idea what the value of the pendant would be worth.

---