Royal Mint Proof Boxes – What Year, What Box? - Where the Royal Mint has been fairly consistent with the reverse designs used, they have not with the style of presentation boxes used.
Why gold is a good investment – and why it is so expensive and rare - Gold has long been a popular choice as an investment. Yet as a metal, gold is too soft for many applications; it is the most malleable metal known. Gold is a good electrical conductor; copper and silver are better and much cheaper, although gold is less prone to corrosion. Yet none of gold's physical properties justify it's extremely high cost.