Ruby Mica Co. Pvt. Ltd. Manufactures Phlogopite Mica Paper. Ruby Mica Co. Pvt. Ltd. Is the manufacturer and exporter of mica. Phlogopite Mica Paper is available in basis weights, 80-270 gsm, deckle width [standard] 1040 mm in roll forms. Phlogopite Mica Paper is used for various purposes chiefly for electro-thermal insulation in many industries.