What does KB mean on gold?

KB on gold typically refers to "karat gold," which is a measure of the purity of gold. The karat system ranges from 1 to 24, with 24 karats representing pure gold. For example, 18K gold means that 18 out of 24 parts are pure gold, with the remaining 6 parts made up of other metals. This measurement helps consumers understand the quality and value of gold jewelry and items.