PL18K on jewelry indicates that the piece is made of 18-karat platinum. The "PL" stands for platinum, while "18K" signifies that the metal is composed of 75% pure platinum, with the remaining 25% typically being other metals for added strength and durability. This marking ensures that the jewelry meets specific quality standards in terms of its platinum content.
The markings "PL18K" and "750" indicate that the item is made of 18-karat gold, with "PL" likely denoting a specific alloy or manufacturer. The "750" stamp also confirms that the gold content is 75% pure, which is standard for 18K gold. Together, these stamps signify the quality and composition of the jewelry or item.
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