glacial still often hydrogen mercury to appear polished
mercury is in_liquid_phase_at_room_temperature. mercury is not metallic_element. mercury is metallic_element. solid_mercury is solid. mercury is not in_liquid_phase_at_room_temperature. solid_mercury is not mercury. mercury is not opaque_thing. solid_mercury is mercury. mercury_vapor_lamp is not ultraviolet_lamp. mercury is opaque_thing.