GST treatment for ready-to-use non-mirror-polished building stones confirmed; reduced levy applies under amended tariff classification. GST applies at a reduced rate to ecaussine and other calcareous monumental or building stones and alabaster (excluding marble and travertine) that are ready to use and are polished other than by mirror polishing; a departmental clarification extends this treatment to Napa Stones finished and polished in non mirror ways, and the schedule entry was amended by a later notification to reflect the current description.