Is the 18k gold in jewelry a lottery gold? What is the alloy usually referred to?
To be exact, colored gold is a kind of 18k gold, but it is painted in many different colors. 18k gold is divided into white, yellow, color, black and other color series. 18k jewelry is a kind of gold jewelry, which refers to gold with a gold content of 75%. The other 25% is other metals, also known as alloys.