Gypsum; anhydrite
Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulfate) whether or not colored, with or without small quantities of accelerators or retarders: > Gypsum; anhydrite
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
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)
Products classified under HTS 2520.10.00.00
Natural Gypsum Rock
Raw gypsum ore extracted from natural deposits, primarily calcium sulfate dihydrate in crystalline form. It falls under HTS 2520.10.00.00 as unprocessed gypsum, distinct from calcined plasters or anhydrite. Used as the base material for plasterboard and cement production.
Gypsum Lumps
Crushed gypsum in irregular lump form, minimally processed after mining but not ground or calcined. Classified under HTS 2520.10.00.00 as crude gypsum suitable for grinding into powder or direct use in agriculture. Ideal for soil amendment due to its sulfur content.
Anhydrite Mineral
Natural anhydrite (calcium sulfate without water of crystallization) mined as a rock or powder. Directly covered by HTS 2520.10.00.00 alongside gypsum, used in cement production and as a drying agent. Distinguished from gypsum by lower water content.
Raw Gypsum Powder
Gypsum ore ground into fine powder without calcination or additives. HTS 2520.10.00.00 applies to this unprocessed form used in plaster production, animal feed, and water treatment. Not to be confused with finished plasters.
Agricultural Gypsum Pellets
Pelletized natural gypsum for soil pH adjustment and sulfur supplementation. Remains under HTS 2520.10.00.00 as uncalcined gypsum, valued in farming for improving clay soils. Pelleting is mechanical, not chemical processing.
Construction Grade Gypsum
High-purity gypsum lumps selected for wallboard manufacturing. HTS 2520.10.00.00 covers this crude form before calcining into stucco. Essential raw material for drywall production.
White Hills Gypsum Ore
Premium white gypsum ore from specific deposits like White Hills, Arizona, prized for purity. Falls squarely under HTS 2520.10.00.00 as natural gypsum for high-end plaster applications. Minimal impurities make it ideal for fine plasters.
Land Plaster Gypsum
Coarse-ground gypsum powder known as land plaster for agricultural use. HTS 2520.10.00.00 applies as uncalcined material for soil sulfur supply. Common in Midwest farming regions.
Synthetic Anhydrite Fines
Fine anhydrite powder from industrial byproducts, chemically equivalent to natural but origin differs. Still classified under HTS 2520.10.00.00 if unprocessed anhydrite form. Used in specialty cements.
Flue Gas Desulfurization Gypsum
Synthetic gypsum from power plant emissions scrubbing, chemically identical to natural gypsum. HTS 2520.10.00.00 covers this high-purity dihydrate form for wallboard and agriculture. Increasingly replaces mined gypsum.
Blue Diamond Gypsum
High-grade gypsum from Blue Diamond Mines, Nevada, known for wallboard quality. Unprocessed ore under HTS 2520.10.00.00, shipped in bulk for domestic processing. Renowned for consistent purity.
Calcined-Free Gypsum Aggregate
Crushed gypsum aggregate for concrete admixture, verified non-calcined. HTS 2520.10.00.00 as crude material improving workability. Used in self-leveling compounds.
Pharmaceutical Grade Gypsum
Ultra-pure natural gypsum meeting USP standards before processing. HTS 2520.10.00.00 as crude material for medicinal plasters. Minimal impurities for health applications.
Dentstone Gypsum Rock
Specialty gypsum ore for dental stone production, high strength precursor. Remains HTS 2520.10.00.00 until calcined into alpha hemihydrate. Selected for uniform crystals.
Eco-Friendly Recycled Gypsum
Gypsum recovered from drywall waste, cleaned to natural equivalent purity. HTS 2520.10.00.00 as reprocessed crude gypsum for sustainable building. Verified free of paper/plastics.