2512 Siliceous fossil coarse powder (such as various diatomaceous earth) and similar siliceous soils, whether calcined or not, have an apparent specific gravity not exceeding 1: HS code chinese tariffs

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25120010 ---Diatomaceous earth ---Diatomaceous earth

25120090 ---Other siliceous fossil coarse powders and similar siliceous soils ---Other siliceous fossil coarse powders and similar siliceous soils