There is no stamps on the necklace but it has been tested for sterling. Necklace weighted 62.6grams on my scale. Please contact me first if you have any problems/questions/concerns with your item and I will be happy to resolve any issues you may have in a cordial and friendly manner before requesting a return. The item "Vintage Navajo Turquoise Squash Blossom Sterling Silver Necklace 19" is in sale since Monday, February 8, 2021. This item is in the category "Jewelry & Watches\Ethnic, Regional & Tribal\Native American\Necklaces & Pendants".The seller is "luvssnickers" and is located in Kansas City, Missouri. This item can be shipped to United States.