Lot Of 2 0.5 gram IGR Gold Bar – Istanbul Gold Refinery 999. Fine in Sealed Assay. IGR – Istanbul Gold Refinery is a well-known and respected global entity. The company encompasses Istanbul Gold Refinery, Gramaltin, e-Waste Factory, IGR Germany, IGR Metals Trading DMCC, and IGR Americas. IGR gold bars, with a purity of 999.9 Fine, offer a practical option for including bullion in one’s investment portfolio. Each bar comes in a sealed plastic assay card with a unique serial number. Specifications include Denomination: 0.5 gram, Metal Type: Gold, Actual Metal Content: 0.015 troy oz, and Fineness.