Rice husk ash contains crystalline tridymite and α-cristobalite and can be used as a silica source for the synthesis of zeolite Beta. Research conducted by Prof. Didik Prasetyoko of Universiti Teknologi, Malaysia and colleques reveales that when rice husk ash is heated at 150 °C in the presence of tetraethylammonium hydroxide, crystallization of zeolite Beta takes place. It was found that zeolite Beta started to form after 12 h and the complete crystallization of zeolite Beta phase was achieved. It is believed that the transformation mechanism of silica present in rice husk ash to zeolite Beta involves dissolution of the ash, formation of an amorphous aluminosilicate after 6 h of crystallization, followed by dissolution in the mother liquor and final transformation to pure zeolite Beta crystals.