This vintage set is high quality, wild and very unusual and would be a great addition to any collection!  Lucite was new in the 20’s and 30’s and has remained quite fashionable to this day.
There are no marks but the style, design and craftsmanship are outstanding and I’m guessing by a name artist for a good maker.  These 3 stunning pieces are in perfect condition.

Earring

Earring Back

The chain looks like brass and is 23” long
The drop is ½”
The Pendant is 3 layers totaling 3” X ¾” thick
The bottom layer of red plastic (maybe Bakelite) is 3” diameter and 1/8” thick
The clear Lucite layer is 1 ¾” diameter and ¼” thick
The top layer is the black plastic (Bakelite?) scarab which is 1 ¼” X 7/8” X 1/8” and is beautifully carved