Chanel did a line that looks like this necklace in the early 80s, this is unmarked

Can anyone who is familiar with Chanel confirm if this is Chanel? It has no markings. They did a line of gripoix that led me to think this could possibly be the real thing. any feedback would be fantastic. I love this piece, it is very heavy and can be worn with the stones on the side or in the center.

I added a picture of the underside, hopefully it shows enough to help. I am happy to take more pictures