White secondary substances usually coexist with brown secondary substances in the jadeite jade. The phenomena show that both of them were formed in the same exogenic environment, which is also known as the oxidizing environment. The white secondary substances are the main component of the white shells, and can exist in the fractures and the gaps among granules, looking like white floccules or white spots. White secondary substances are small collections of mainly clay minerals existing on the edges and in the cracks of the grains of jadeites. They belong mainly to metasomatic texture and subordinately to cavity filling texture. Infrared absorption spectroscopic and electron microprobe analyses show that the white secondary substances are mainly kaolinite or kaolinitic, and there are paracelsian and agrellite which seldom occur in rocks. It is shown that the composition of white secondary substances is relatively complicated.