Abstract: The invention discloses an improved structural glass composition and process for manufacture. In one embodiment in which the improved structural glass may be used in isolation, the glass comprises a foamed glass core which is manufactured by supplying a glass base through which a gas is infused, either by reaction or by entrapment. As the gas to glass ratio is increased to an optimum level, the quality of the foamed glass moves from a stiff homogeneous glass which is strong in compression, weak in compression and brittle, to a foamed glass which is strong in compression, weak in tension and ductile. In a second embodiment of the invention inorganic fibers supported by a glass matrix may be wrapped around the foamed glass core. This fibrous material is generally strong in tension and also ductile. The resultant combination is a glass structure which is both strong in compression and strong in tension and which is ductile.