Import Duty for Worked Monumental Or Building Stone Except Slate And Articles Thereof Other Than Goods Of Heading 6801 Mosaic Cubes And The Like Of Natural Stone Including Slate Whether Or Not On A Backing Artificially Colored Granules Chippings And Powder Of Natural Stone Including Slate Marble Travertine And Alabaster

In the US HTS, 6802.21.5000 represents Worked monumental or building stone (except slate) and articles thereof, other than goods of heading 6801; mosaic cubes and the like, of natural stone (including slate), whether or not on a backing; artificially colored granules, chippings and powder, of natural stone (including slate): > Marble, travertine and alabaster: > Other. It is a subheading of Tiles, cubes and similar articles, whether or not rectangular (including square), the largest face of which is capable of being enclosed in a square the side of which is less than 7 cm; artificially colored granules, chippings and powder in Chapter 68.

Calculation involves the ad valorem rate plus fees like MPF. For 6802.21.5000, check if your country of origin qualifies for special treatment here.