5 Gram 9999 Gold Bar The Royal Mint Best Wishes Serial number can be different. Country: United Kingdom Weight: 5.00g Purity: 999.9 Fine Gold Mint: The Royal Mint Packaging: Blister COA Struck in five grams of highly pure 99.99% fine gold, the Best Wishes design was conceived by The Royal Mint artist Jody Clark. This 5 gram gold bar is a great option for those wanting to give a memorable precious metal gift!