Buying diamonds and gold is not something you see only in historical movies. Investing in jewellery and precious metals remains popular and is a good way to diversify your investment portfolio or to counter inflation. Although eight metals are currently considered precious, gold, silver and platinum are the most popular for investing, while ruby is the most valuable gemstone. Dina Matvejeva, Head of Luminor Private Banking, explains how safe this type of investment is and when to choose it.