This bar is made of 22k (916) yellow gold. this 1 gm gold bar comes with bis hallmark.bis hallmark is not a separate certificate, it is an inscription made on the product.the product is 1.2 cm in length and 1 cm in width.the product will be an excellent pick for you. this is stylish, trendy and classy. it is safely packaged for your convenience, protecting it from damages.