Regardless of the stock market situation, gold has always been considered a solid investment. The value of gold varies based on market demand and carat weight (K). The higher the weight (24K is the highest and it is almost pure gold), the more expensive the piece will be. Because of this, 14K gold is more accessible, as it is a mixture of gold and other alloys. If you have a 14K gold necklace or jewelry, determining its true value requires a bit of math.