New vintage jade pendant necklace on round snake chain

New vintage jade pendant necklace on round snake chain Quick list New vintage c. 1970s. Gold tone metal. Genuine B.C. Jade. No hallmarks. I think this is one of the pieces from Hong Kong. Unique style. Great details, quality, colour. But not gold, maybe not even gold plate. But quality costume. Especially considering these pieces are already almost 50 years old! I thought there was a hallmark on the chain but it’s just a blobby. (Last 2 pictures)