Perthite Chippings
Chippings for specialty concrete. 2517.49.00.00.
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Related Products under HTS 2517.49.00.00
Granite Chippings 3-6mm
Chippings of granite stone (heading 2516) crushed to 3-6 mm size, ideal for pathway surfacing, railway ballast fines, or asphalt mixes. Falls under HTS 2517.49.00.00 as 'chippings' of heading 2516 stones, whether heat-treated or not. Distinguished from powder by coarser grain size.
Limestone Powder Fines
Fine powder derived from crushed limestone (heading 2515), particle size under 2mm, used in cement production, animal feed supplements, or soil amendment. HTS 2517.49.00.00 covers such powders of heading 2515/2516 stones, post-crushing. Not to be confused with precipitated calcium carbonate chemicals.
Quartzite Chippings
Chippings from crushed quartzite (heading 2516), 5-10mm, for decorative gravel, terrazzo flooring aggregates, or water filtration. HTS 2517.49.00.00 as chippings of 2516 stones. High silica content distinguishes from marble.
Travertine Powder
Fine powder from ground travertine limestone (heading 2515), used in paints, plastics fillers, or restoration mortars. Under HTS 2517.49.00.00 as powder of 2515 stones, particle size <75 microns typical.
Gneiss Granules
Granules of crushed gneiss metamorphic rock (heading 2516), 2-4mm, for concrete countertops or garden mulch. HTS 2517.49.00.00 for processed granules of such stones.
Sandstone Chippings
Chippings from crushed sandstone (heading 2516), used in hydraulic fracturing or roofing granules. HTS 2517.49.00.00 applies.