Inflation is the rate at which the general level of prices for goods and services is rising and, consequently, the purchasing power of currency is falling. Central banks attempt to limit inflation, and avoid deflation, in order to keep the economy running smoothly. Next Up.
If you are not allergic to metal, the reason for this reaction is chemical. It's due to a combination of the metal and the acids in your skin. Experts say that there are several metals that oxidize with your skin to give you a noticeable green ring around your finger. A ring made of copper is a common culprit, but even silver and gold metals can cause discoloration.
Gold is one of the most common and desired metals used in rings of all varieties. The metal's popularity for men's or women's engagement and wedding rings is unsurpassed. 10kt, 14kt and 18kt are the most common karat values found. The larger the karat, the higher the percentage of pure gold in the ring and the more expensive it will be.