1 Gram Gold Bar – Istanbul Gold Refinery. Sealed Assay Card Included. Produced by Istanbul Gold Refinery, LBMA-certified and internationally recognized. Contains 1 gram of 99.99% pure gold. Sealed in original assay card for verification of weight and purity. Each assay card includes a unique serial number and security features. Perfect for investing, collecting, or gifting. See photos for more details.