The Royal Mint of the United Kingdom, which makes the country's circulating coinage, is also very active in the bullion coinage space and issues many bullion coins which are legal tender.
Additionally, it also makes bullion which is not legal tender and is targeted at investors and not at coin collectors - such as this one.
This gold bar is intended as a Christmas gift.
The Royal Mint says about it:
Christmas feels incomplete without the glow of gold. From the Three Wise Men bringing gifts of gold, frankincense and myrrh to baby Jesus in the nativity story to the golden shimmer of lights and ornaments that people decorate their homes with today, gold is an essential part of Christmastime.
This Christmas, follow a tradition started thousands of years ago and give the gift of gold. The Royal Mint’s new, expertly crafted Christmas Tree one gramme gold bullion minted bar is presented in an elegant seasonal sleeve, ready to gift. | 
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