Rough Miners' Diamonds from Kimberley Mine from Japan
These are unworked miners' diamonds extracted directly from primary diamond mines like Kimberley, featuring irregular shapes and natural inclusions typical of rough industrial-grade stones. Classified under HTS 7102.21.10 as miners' diamonds, which are specifically diamonds in the natural state from mining operations, not subjected to sawing, cleaving, or bruting. They are primarily used in industrial applications such as drilling and cutting tools due to their hardness.
Duty Rate — Japan → United States
Rate breakdown
Import Tips
• Verify origin certificates from recognized mines to confirm 'miners' diamonds' status and avoid reclassification as sorted rough diamonds
• Provide geological assay reports documenting natural unworked state, as any processing like sorting by size may shift to 7102.21.30
• Declare exact weight and caratage accurately; common pitfalls include undervaluation leading to audits on industrial vs gem-quality distinctions