Since maskelynite (like the volcanic glass obsidian) lacks an orderly arrangement of atoms, it is not considered a "mineral" by geologists, and is not listed as such by the Mineralogical Society of America.

The phase was first identified in the Shergotty meteorite by G. Tschermak (1872) as an isotropic glass of an unknown origin with near labradorite composition.

In 1963, D. J. Milton and P. S. de Carli produced a maskelynite-like glass by subjecting gabbro to an explosive shock wave.

[3] At first, maskelynite was believed to result from solid-state transformation of plagioclase into diaplectic glass by a relatively low-pressure shock wave (250 to 300 kilobars) and low-temperature (350°C), as in Milton and de Carli's experiment.

[2] Since 1997, this hypothesis has been challenged and now it is believed that the glass is formed by the quenching of dense mineral melts produced by higher-pressure shock waves.