Bluish-white, lustrous metal. Brittle at ambient temperatures, however it is malleable at 100 to 150 degrees (C) and is a 'okay' conductor of electricity. The density is 7.140 g/mL. This means the mineral will sink in water and is reasonably heavy. (These are physical, if you need them)
(These will be chemical, what you asked for.) It is based upon sulfide ores. It is roasted in industrial plants to form zinc oxide, ZnO. This may be reduced with carbon to form zinc material. Zinc burns in air at high red heat with evolution of white clouds of the zinc oxide.