This stunning necklace features a vibrant green pendant set in a luxurious gold frame. Perfect for adding a touch of elegance to any outfit. This is a well-made piece of costume jewelry I believe it to be glass and possibly lucite to look like a green emerald pendant, but it is either plastic or glass. In my opinion. It is marked 18 karat gold plated, but I cannot guarantee that that is what it is. I bought this from another poshmark seller. It’s well-made, very pretty and it’s just a very nice piece of costume jewelry. It is not expensive jewelry. It is faux and fun.