: Contains 41.7% gold. It is the minimum purity required to be legally sold as "gold" in the U.S. and is highly durable.
: Solid gold can be yellow, white, or rose, depending on the other metals in the alloy (e.g., more copper creates rose gold). matures gold
: 99.9% pure gold. While it is the "purest," it is generally considered too soft for most jewelry items. Solid Gold vs. Other Gold Types : Contains 41