EFFY STERLING SILVER 1/2 CARAT DIAMOND NECKLACE

I had purchased this from a department store and had it sent to Effy to be stamped. Unfortunately the stamp is so tiny that I can’t get a picture of it but it is 100% authentic. I purchased as a gift but ended up not giving it and thought about keeping but I know I won’t wear it. I don’t normally sell fine jewelry but am pricing so that it will be sent to Poshmark for authentication since I realize it is a big purchase.