With the size and price offered by Money Metal Exchange on these 1-gram gold bars, it's smart to invest and prepare for the future. It's time to consider keeping 1-gram gold bars and other physical bullion products within a Roth IRA Gold. Also look for ounces of silver for sale if this is your first time investing and you're not prepared to pay the cost of gold. Available weights are 1 gram gold bars, 5 gram, 10 gram, 20 gram, 1 ounce gold bars, 10 oz gold bars or 1 kilo (32.15 oz) gold bars.