lapis infernal is

Lunar caustic. lapis-lazuli, s. Min.: An isometric mineral, rarely occurring in rhombic dodecahedrons. Cleavage, dodecahedral, imperfect; mostly ma ive; hardne , 5 to 5.5; specific gravity, 2.38 to 2.45; luster, vitreous; colors, rich blue, violet-blue, rarely red or green, translucent to opaque; fracture, uneven. Composition: A silicate of alumina, lime, and soda, with a sulphide of iron and sodium. Used largely in mosaics and decorative work. When powdered, formerly constituted the durable blue paint called ultramarine, but an artificial preparation of similar composition, equal in color and durability. has replaced the natural mineral, and is extensively used in the arts. Found principally in crystalline limestones in Asiatic Ru ia, Persia, China, Thibet, and in North and South America. lapis-lydius, s. Min.: Lydian stone. [BASANITE.] lapis-ollaris, s. Min.: An impure soapstone or steatite (g.v.), formerly used for utensils of various kinds. Found in thick beds in old rocks, in Italy, Switzerland, . Lăp-lănd-er, s. [Eng. Lapland ; -er.] A native of Lapland; a Lapp.