Other
Mineral substances not elsewhere specified or included: > Other: > Other > Other
Duty Rate (from China)
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified under HTS 2530.90.80.50
Unexpanded Vermiculite Ore
Raw vermiculite ore mined from natural deposits, unroasted and unexpanded, used primarily as a lightweight filler in construction and horticulture mixes. Classified under HTS 2530.90.8050 as unexpanded vermiculite, a mineral substance not elsewhere specified per Chapter 25 notes. It lacks processing beyond basic extraction and sizing.
Natural Perlite Rock
Crude perlite ore, a glassy volcanic rock in unexpanded form, suitable for expansion into lightweight aggregates. Falls under HTS 2530.90.8050 as unexpanded perlite per chapter notes, distinct from processed or expanded forms. Used in filtration, insulation, and horticulture after further processing.
Calcined Earth Colors Powder
Mixture of natural iron oxide earth colors like ochre and umber, calcined for pigment stability but containing less than 70% Fe2O3 equivalent. Classified in HTS 2530.90.8050 under chapter notes for calcined earth colors not meeting heading 2821 thresholds. Used in paints, ceramics, and artistic applications.
Micaceous Iron Oxide Flakes
Natural micaceous iron oxide in thin flaky form from mineral deposits, used as anti-corrosive pigments in paints. HTS 2530.90.8050 per chapter note covering natural micaceous iron oxides as NES minerals. Not synthetic or purified beyond natural separation.
Raw Meerschaum Blocks
Unpolished blocks of natural meerschaum (sepiolite), a soft white mineral clay from Turkish deposits, prior to carving. Covered under HTS 2530.90.8050 as meerschaum per chapter notes, not worked beyond extraction. Primarily imported for pipe and carving crafts.
Amber Nuggets
Rough, unworked fossilized tree resin nuggets harvested from Baltic sea deposits, suitable for jewelry after tumbling. HTS 2530.90.8050 includes amber as a NES mineral substance per chapter notes. Not cut, polished, or shaped.
Agglomerated Meerschaum Rods
Meerschaum powder molded and agglomerated into rods without further working, used for pipe stems or industrial fillers. Specifically listed in HTS 2530.90.8050 chapter notes for agglomerated meerschaum in rods or similar forms. Not sintered or machined post-molding.
Jet Mineral Chunks
Rough chunks of natural jet, a hard black lignite gemstone from Whitby mines, unworked for jewelry use. Classifiable under HTS 2530.90.8050 as jet per chapter note for this organic-origin mineral. Prized for Victorian mourning jewelry.
Strontianite Powder
Ground strontianite (strontium carbonate) ore, calcined but not converted to oxide, used in pyrotechnics and ceramics. HTS 2530.90.8050 explicitly covers strontianite other than strontium oxide per chapter notes. Natural mineral not chemically synthesized.
Chlorite Mineral Flakes
Natural unexpanded chlorite schist flakes, green micaceous minerals used in fillers and refractories. Included in HTS 2530.90.8050 as chlorites per chapter heading 2530 notes. Mined and lightly separated, not processed further.
Broken Pottery Pieces
Clean fragments from rejected ceramic production, sorted for use as grog in new clay bodies. HTS 2530.90.8050 covers broken pieces of pottery per chapter notes as mineral recycling. Not melted or reformed.
Crushed Concrete Rubble
Processed clean concrete demolition rubble, crushed to aggregate size for road base or fill. Included under HTS 2530.90.8050 for broken concrete pieces per chapter notes. Free of rebar and hazardous materials.
Natural Meerschaum Polished Pieces
Hand-polished pieces of solid natural meerschaum, retaining block form without carving details. HTS 2530.90.8050 allows polished meerschaum per chapter note (h), before article formation. Used as display specimens.