Coro Choker Necklace

This choker is approximately 16 inches tip to tip. It has a J hook closure with a ball on the other end of the chain. The chain is made up of rectangular links joined by round split rings. The J hook contains the works "Coro" with the copyright emblem following the name. Not sure what type of material the stones are made from but they are round with flat backs set on top of goldtone base link pieces that are held together by flat rectangular links that curve around holding the bases in place. The base pieces are round shaped with a curved swirl down one side on the top beside each stone. The stones are yellow with flecks of what appears to be gold flake and silver flake floating inside. The stones are not glass, but rather a plastic type material (maybe Lucite?) The piece belonged to my mother and she had it as long as I can remember and I am 60 years old. I would like to know any information about this piece that I can get. It has sentimental value to me since it belonged to my mother who passed away over 20 years ago. It is piece that I would like to pass on to my daughter eventually. I have been unable to find any pictures of anything similar online. Thanks for the help!