An inorganic composition article used in disk substrate for information recording media, with a low melting point and a high productivity, combining superior surface characteristics capable of sufficiently dealing with a ramp load system for high density recording in both an in-plane magnetic recording system and a perpendicular magnetic recording system, having a high mechanical strength capable of enduring high speed rotation and impact, and combining both a heat expansion characteristic and heat resistance corresponding to each drive component. The inorganic composition articles contain a Li.sub.2O component and an Al.sub.2O.sub.3 component, with the percent by mass ratio of Li.sub.2O to Al.sub.2O.sub.3 (Li.sub.2O/Al.sub.2O.sub.3) being at least 0.3, include crystals, and have a compressive stress layer arranged on a surface.