Lu"ma*chel (?), Lu`ma*chel"la (?), n. [F. lumachelle, It. lumachella, fr. lamachella a little snail, dim. of lumaca a snail, fr. L. limax, -acis.] Min.
A grayish brown limestone, containing fossil shells, which reflect a beautiful play of colors. It is also called fire marble, from its fiery reflections.
© Webster 1913.