Based only on the images provided, you may have two authentic California Fractional Gold Coins, and one tourist token, circa 1920 - 1950. The two that appear authentic have an actual value on them. Both 1/2 dollar. The token (some people call them fakes) has been made into a pendant. The token could be anything from a badly plated base metal, usually copper or brass, all the way to alloys up to 90% gold. My books on these are in storage, or I would make an attempt to look up the two that appear genuine.
I have not had the opportunity to obtain any genuine samples, but I do have many dozens of the “fakes”.
Time for more coffee.