Explanatory notes
… of slate or of agglomerated slate. Natural slate falls in heading 25.14 when in the mass, or in the form of blocks, … processed (e.g., sawn or cut otherwise than rectangular (including square), ground, polished, chamfered, drilled, … varnished, enamelled, moulded or otherwise ornamented). It includes, inter alia , articles polished or otherwise worked …