Bort Miners' Diamonds for Saw Blades from Japan
Crushed and irregular bort diamonds classified as miners' diamonds for embedding in industrial saw blades used in stone cutting. Falls under HTS 7102.29.0020 as other unmounted, unworked industrial diamonds specifically for mining tools. Their low clarity makes them ideal for high-wear abrasive applications.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Provide lab assays confirming bort quality and industrial grade to prevent misclassification as gem material
• Use proper packing to avoid damage; declare as 'industrial miners' diamonds' explicitly on commercial invoice
• Watch for pitfalls in alloy mixtures; if clad or sintered beyond 2% precious metal rules, classification may change