Antique 1930’s sterling silver blue floral stone Marcasite necklace pendant

Antique, 1930’s sterling silver floral blue carved pendant With Marcasites, carved blue floral is molded glass or celluloid acrylic resin, Pendant necklace, in good condition unusual paperclip like chain, the closure bail and one of the jumper rings look to be changed and look to be plated brass, the pendant is marked sterling, the chain looks to belong to the pendant so I believe sterling, selling off some of my old collection.