This paper introduces briefly the points of similarity between mineral crystals and buildings

and explicates mainly the use of crystal forms in design of external forms of buildings

such as mountain crystal-form building

beryl-form building

tourmaline-form building

twin-crystal-form building

overgrowth-form building

parallel intergrowth-form building

and inlay-form building. Crystal-form building has the following advantages

natural and beautiful moulding

rational structure of mechanics

better anti-seismic property

better natural light and ventilation

economizing on land and building materials

applicable to tall buildings and so on.