Beautiful necklace - antique brass tone, sea green, sage stones, Jadeite like

What a gorgeous necklace - it looks vintage but I don't think it actually is because it has a lobster claw closure. I couldn't find any mark or logo on it, which is a shame because it's such a stunner. The main stone is oval, sort of an opaque sea green or even Jadeite; and the other large stone is a transparent sage green teardrop. There are some teardrop and marquis cut clear stones between them,and 4 smaller green stones next to the chain that are oval and octagonal. Of course there are little sparklers all around them. The necklace measures approx 17.5" end to end. Feel free to ask questions. Sorry, no shipping Saturdays. Thanks for looking!