2530.10.00.00 - Vermiculite, perlite and chlorites, unexpanded

This HTS category, 2530.10.00.00, specifically classifies unexpanded vermiculite, perlite, and chlorites. These are naturally occurring minerals that, in their unexpanded state, have not undergone any thermal treatment that would cause them to exfoliate or significantly increase in volume. Vermiculite is a hydrated laminar magnesium-aluminum-iron silicate, while perlite is an amorphous volcanic glass. Chlorites are a group of green phyllosilicate minerals. The key defining characteristic for this classification is their unexpanded physical form.

This classification is distinct from its siblings. Unlike 2530.20, which covers natural magnesium sulfates like kieserite and epsom salts, this category deals with silicates and volcanic glass. It also differs from the "Other" category (2530.90), which serves as a residual classification for any other mineral substances not elsewhere specified or included within Chapter 25. Therefore, 2530.10.00.00 is exclusively for these specific unexpanded mineral types.

As this is a leaf node within the HTS database, there are no further subcategories under 2530.10.00.00. Classification under this heading hinges on the identification of the material as either vermiculite, perlite, or chlorites in their raw, unexpanded state. Evidence of thermal expansion would necessitate classification under a different heading, typically related to expanded minerals.