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The metal is not plated or plumb gold, P18K (or simply 18K) is a fineness mark that guarantees the item is made of 18-karat pure gold. This means the item contains 75% pure gold by weight, mixed with 25% other metals (like copper or silver) for added durability. In international markets, this is also frequently represented by the number 750.
CA is the manufacturer's trademark or maker's mark. In the jewelry trade, this two-letter stamp helps appraisers and jewelers identify the specific workshop, company, or designer that crafted the piece.
