Lū'ma·chel or Lū'ma·chel'la, n.

(Synop., § 130), n. [Fr. lumachelle, It. lumachella, from lumachella, a little snail, dim. of lumaca, a snail, fr. Lat. limax, limacis.] (Min.) A grayish-brown limestone, containing fossil shells, which reflect from within the stone a beautiful play of colors. It is also called fire-marble, from its fiery reflections. Dana.