melilite

noun

A mineral of a yellow or grayish yellow, found at Tivoli and Capo di Bove, near Rome.

noun

A mineral occurring in small yellow crystals, found in the lavas (melilite basalt) of Vesuvius, and elsewhere.

noun

any mineral consisting of a solid solution of gehlenite (Ca2Al2SiO7) and akermanite (Ca2MgSi2O7)