Ăl'lo-phāne, n.

n. [Gr. ἀλλοφανής, appearing otherwise, from ἄλλος, other, and φαίνειν, to appear.] A mineral, of a pale blue color, and sometimes greenish, brownish, or colorless, occurring massive or in thin reniform incrustations. It loses its color before the blow-pipe, whence its name. It consists chiefly of silica, alumina, and water. Dana.