0.19ct diamond necklace 14K gold

From a Montreal local designer. I don’t have an ID card to authorize the diamond, but Poshmark will check it for you and your $ is safe. Only recommended for serious buyer who knows about diamonds. Comes with the original leather box. The last picture is a similar one from Tiffany: 0.17ct diamond and 18K gold necklace. Designers always copy each others, and this is a sample design to make. Should I pay double price for the BRAND? Please leave your comments to help me deciding. Thanks!