Synthetic Sapphire Boule from China
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 — China → United States
44%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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