Chapter 2530 — Customs Tariff Headings

Chlorite Mineral Flakes

Loose chlorite mineral in flake or schist form, unprocessed and unexpanded, sourced from metamorphic rock deposits. This product is in a crude state and has not been subjected to any processing beyond mechanical processes, so it falls under tariff item 2530.10.00 for unexpanded chlorites. It is commonly used in ceramics and fillers.

Crude Chlorite Powder

Lightly crushed chlorite mineral powder, uncalcined and unexpanded, for use in paints or plastics. The crushing is a mechanical process that does not alter the structure, keeping it within the scope of unexpanded chlorites. This product is not roasted, calcined, or mixed, so it qualifies under tariff item 2530.10.00.

Horticultural Vermiculite Flakes

Screened unexpanded vermiculite flakes sized for potting mixes, remaining in crude mineral state without heat treatment. Screening is a mechanical process allowed by Chapter 25 notes, and the product is not expanded or processed further. This product is classified under tariff item 2530.10.00 as unexpanded vermiculite.

Industrial Perlite Granules

Coarse unexpanded perlite granules for industrial expansion into abrasives or filters, unheated from natural ore. The granules are in a crude state, only mechanically processed, and not expanded. This product falls under tariff item 2530.10.00 as unexpanded perlite.

Raw Vermiculite Ore

Natural vermiculite ore extracted from deposits, unexpanded and in its crude form as loose flakes or granules. This product is in the crude state and has not been subjected to any processing beyond extraction and simple sorting. It is classified under tariff item 2530.10.00 as unexpanded vermiculite.

Unexpanded Perlite Rock

Crude perlite ore in loose rock or granular form, unheated and unexpanded, directly from volcanic deposits. This product is in a crude state and has not been processed beyond extraction and simple sizing. It falls under tariff item 2530.10.00 as unexpanded perlite, a lightweight siliceous mineral used in filtration and insulation.

Agricultural Epsom Salt Nuggets

Agricultural epsom salt nuggets are large natural epsom salt forms intended for slow-release soil application. As unprocessed natural magnesium sulphate heptahydrate, they fall under tariff item 2530.20.00, which covers epsomite and natural magnesium sulphates, provided no chemical processing has occurred.

Bulk Natural Magnesium Sulfate Heptahydrate

Bulk natural magnesium sulfate heptahydrate is unrefined epsom salt from natural deposits, used for industrial magnesium extraction. As a natural mineral in crude form, it is classifiable under tariff item 2530.20.00, which includes epsomite and natural magnesium sulphates, and is not excluded by chapter notes.

Crude Kieserite Crystals

Crude kieserite crystals are naturally occurring magnesium sulfate monohydrate minerals extracted from evaporite deposits. They are minimally processed by washing to remove surface impurities, which does not alter their crystalline structure, and are therefore classified under tariff item 2530.20.00 as natural magnesium sulphates.

Evaporite Epsom Salt Coarse Grade

Evaporite epsom salt coarse grade consists of coarse crystalline epsom salt extracted from ancient evaporite basins. Before grinding or refining, it is a natural magnesium sulphate heptahydrate, classifiable under tariff item 2530.20.00, as the extraction and sizing are mechanical processes permitted by chapter note 1.

Kieserite-Epsom Salt Mineral Blend

Kieserite-epsom salt mineral blend is a natural mixture of kieserite monohydrate and epsom salt heptahydrate from evaporite deposits. As a natural combination of magnesium sulphates, it falls under tariff item 2530.20.00, which covers both kieserite and epsomite, provided no mixing with other substances has occurred.

Kieserite Evaporite Rock

Kieserite evaporite rock consists of kieserite-bearing material from ancient salt deposits, crushed to fist-sized pieces for transport. The crushing is a mechanical process permitted by chapter note 1, and the rock remains a natural magnesium sulphate, classifiable under tariff item 2530.20.00.

Kieserite Mineral Flakes

Kieserite mineral flakes are produced by crushing and screening raw ore, resulting in flaked natural magnesium sulphate without chemical alteration. This mechanical processing is within the scope of chapter note 1, so the flakes are classified under tariff item 2530.20.00 as natural magnesium sulphates.

Natural Epsom Salt Crystals

Natural epsom salt crystals are mined magnesium sulfate heptahydrate appearing as transparent to white crystals. As a naturally occurring mineral in crude form, they are classifiable under tariff item 2530.20.00, which covers epsomite and natural magnesium sulphates, and are distinct from synthetic forms.

Natural Kieserite Ore

Natural kieserite ore is raw material extracted from natural deposits, composed primarily of magnesium sulfate monohydrate. As an unprocessed natural mineral, it is directly classifiable under tariff item 2530.20.00, which covers kieserite and natural magnesium sulphates not elsewhere specified.

Pharmaceutical-Grade Natural Epsom Crystals

Pharmaceutical-grade natural epsom crystals are high-purity natural epsom salt selected for minimal impurities, intended for pharma laxative production. As the natural mineral form before chemical processing, they remain classifiable under tariff item 2530.20.00, provided they are not formulated into medicaments, which are excluded by chapter note 2(c).

Washed Kieserite Concentrate

Washed kieserite concentrate is produced by water washing raw ore to achieve over 95% purity, without drying or heating. Washing is explicitly permitted by chapter note 1 as a process that removes impurities without changing the product's structure, so it remains under tariff item 2530.20.00.

Agglomerated Meerschaum Rods Unworked

Meerschaum powder agglomerated into rods or sticks, not further worked after molding. This product is explicitly listed in the chapter notes for tariff item 2530.90.00 as agglomerated meerschaum in rods or similar forms.

Calcined Earth Colors Mix

Mixture of calcined natural earth colors like ochers and umbers for artist pigments. This product is classifiable under tariff item 2530.90.00 as earth colors, whether or not calcined or mixed together, provided the iron content is below 70% by weight.

Goethite Micaceous Iron Oxide Ore

Micaceous variety of goethite iron oxide with flaky platelets, sourced from sedimentary iron formations. This natural micaceous iron oxide is unprocessed and classifiable under tariff item 2530.90.00, which explicitly includes natural micaceous iron oxides.

Greenland Cryolite Crystals

Natural cryolite crystals from the Ivigtut deposit in Greenland, unprocessed and in their natural mineral state. These crystals are used primarily as a flux in metallurgical applications, particularly aluminum smelting, and fall under tariff item 2530.90.00 as mineral substances not elsewhere specified.

Ivigtut Cryolite Specimen

Museum-grade natural cryolite crystals from the historic Ivigtut mine, in their natural specimen form for geological collections or research. These unworked mineral specimens are classifiable under tariff item 2530.90.00 as mineral substances not elsewhere specified, provided they are not polished or processed.

Limonite Micaceous Iron Oxide Fines

Fine particles of limonite-based micaceous iron oxide, a hydrated iron ore with platy morphology from natural deposits. This natural micaceous iron oxide is classifiable under tariff item 2530.90.00 as explicitly listed in the chapter notes.

Micaceous Iron Oxide Flakes

Coarse, plate-like flakes of natural micaceous iron oxide mined from specular hematite deposits, prized for anti-corrosive properties. These unworked natural flakes are classifiable under tariff item 2530.90.00 as natural micaceous iron oxides.

Micaceous Iron Oxide Lumps

Natural micaceous iron oxide in lump ore form before grinding, used as raw feed for pigments. This product is classifiable under tariff item 2530.90.00 as natural micaceous iron oxide, explicitly listed in the chapter notes.

Mixed Natural Mineral Pigments

Blend of natural ochers, siennas, and umbers mixed for pigment use, calcined. This product is classifiable under tariff item 2530.90.00 as mixed earth colors with iron content below 70%, as specified in the chapter notes.

Natural Chiolite Mineral

Natural chiolite, a rare sodium aluminum chloride fluoride mineral found in cryolite deposits, used in specialty fluxes. This mineral is unprocessed and classifiable under tariff item 2530.90.00 as a mineral substance not elsewhere specified, similar to natural cryolite.

Natural Cryolite Granules

Naturally occurring granular cryolite from weathered deposits, minimally handled after mining. The granules remain in their natural mineral form without artificial processing, making them classifiable under tariff item 2530.90.00 as mineral substances not elsewhere specified.

Natural Cryolite Ore

Raw sodium aluminum fluoride mineral extracted from deposits in Greenland, used primarily as a flux in aluminum smelting. This natural cryolite ore is unprocessed and classifiable under tariff item 2530.90.00 as a mineral substance not elsewhere specified.

Natural Micaceous Iron Oxide Powder

A fine powder derived from natural micaceous iron oxide deposits, characterized by its flaky, mica-like structure and high iron content. This natural powder is classifiable under tariff item 2530.90.00 as natural micaceous iron oxide, provided it is not chemically processed.

Specular Hematite Micaceous Iron Oxide

Natural specular hematite ore featuring micaceous iron oxide with metallic luster and platy crystals, extracted from geological deposits. This natural mineral matches the legal definition of natural micaceous iron oxide and is classifiable under tariff item 2530.90.00.