Does 8545 marking mean its gold?

Yes, the marking "8545" typically indicates that the item is made of gold, specifically referring to a gold alloy that is 85.45% pure. In jewelry, the number before the decimal point often represents the karat, with 24 karats being pure gold. Therefore, 8545 suggests a high-quality gold content, but it's always advisable to verify with a professional for authenticity.