How do the various grading systems for gemstones, such as the 4Cs for diamonds, differ between countries, and what should international buyers be aware of when purchasing gems abroad?

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on July 23 2025 at 05:29 PM in Jewelry & Precious Stones - Other

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How do the various grading systems for gemstones, such as the 4Cs for diamonds, differ between countries, and what should international buyers be aware of when purchasing gems abroad?