Synthetic Sapphire Boule from Japan
A large single-crystal synthetic sapphire boule weighing over 2.5 grams, used in electronics and optics manufacturing. Classified under HTS 3824.99.1900 as cultured crystals (excluding optical elements of Chapter 90) that are not elsewhere specified. These are grown via methods like Czochralski process for substrate 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
• Verify crystal weight exceeds 2.5g per unit and obtain lab certification confirming synthetic cultured origin to avoid misclassification as natural gems
• Include detailed growth method documentation (e.g
• Kyropoulos process) and end-use statements to distinguish from optical elements in Chapter 90