The marking “750” found on gold items indicates the purity of the metal. It signifies that the piece is composed of 75% pure gold and 25% other metals, such as silver, copper, or zinc. This standard is often referred to as 18 karat gold. For example, a ring bearing this mark will contain 750 parts gold per 1000 parts total alloy composition.
This hallmark is important because it provides assurance of the gold content to buyers and sellers alike. Historically, such markings have served as a standardized measure, allowing for fair trade and valuation. The presence of this indicator allows for accurate pricing based on the gold’s intrinsic value and contributes to consumer confidence in the authenticity and worth of the precious metal item.