The number 375 on your gold bracelet means it is 37.5% pure – your gold is 9 karat. The remaining 62.5% of the product is a combination of two or more metals, such as nickel, copper, or silver. The 375 hallmark on your gold bracelet is a convenient way to prove its purity to potential buyers and sellers. 375 gold jewelry is an excellent option because it does not tarnish like silver, and you can easily clean it with a felt cloth. It usually lasts longer because it is more durable than silver and gold-plated jewelry and maintains its value.