The microcrystal spar （ also called microcrystal glass ） is a natural inorganic material, and it is also a kind of new green environment-protecting high-quality building material sintered twice under high temperature in high and new technology. It has the good qualities of flat and clean surface, well-distributed and unanimous tone, clear and elegant vein, mild and glittering luster, beautiful and brilliant color, solid but fine grains, non-water-absorbing and anti-pollution, acid- and alkali-resisting and weathering-proof, green and environment-protecting, and no radioactivity. All these good physical quality is incomparable of the natural stone materials. All kinds of flat plates and cambered plates of different colors could be used in any place such as the inner and outer wall surface, floors, surface of desks and furniture where needs stone material to build or decorate.