Eighteen karat red gold may be made of 25% copper and 75% gold. For 18 karat rose gold, typically about 4% silver is added to 75% gold and 21% copper to give a rose color. 14 karat red gold is often found in the Middle East and contains 41.67% copper.
Redwood Falls is a city in Redwood County in the U.S. state of Minnesota. The population was 5,254 at the 2010 census. It is the county seat.
Carlton County is a county located in the State of Minnesota. As of the 2010 census, the population was 35,386. Its county seat is Carlton. A portion of the Fond du Lac Indian Reservation is in the county. The county was formed in 1857 and organized in 1870. Carlton County is included in the Duluth, MN-WI Metropolitan Statistical Area.