Explanatory notes
… or other special properties, for other industrial purposes (e.g., ruby, sapphire, agate, piezo-electric quartz). The … 82.01 to 82.06 or in machinery, etc., of Section XVI (e.g., piezo-electric quartz for high frequency apparatus, … This subheading includes stones roughly worked by sawing (e.g., into thin strips), cleaving (splitting along the …