Calcareous Tuff Blocks from Mexico
Calcareous tuff, a volcanic calcareous stone, roughly cut into rectangular blocks for monumental sculptures and construction. Meets density criteria for heading 2515 with specific gravity 2.5+. HTS 2515.20.00.00 applies to this other calcareous building stone.
Duty Rate — Mexico → United States
13%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Geological assay required to confirm calcareous (not siliceous) composition
• Label with quarry origin to trace for quality disputes or recalls
• Test for acid solubility; high-calcium content validates 2515 classification