( 57 1 ) • J -’4 TWENTIETH SPECIES. ; Cube Spar. Wurfelfpath.—IJVrwr. ^Iuriacite, Klaproth Anhydrous fulphat of lime, Hauy, i External Characters. w Its colour is milk white, which fometimes paffeS >nto greyiffi white, yellowiffi white, and reddiffi white; 'vhich latter approaches to pearl grey. : 1 ; Maffive. Luftre fluffing, puffing into fplendent, and perfectly Pearly. Erasure perfe£Hy foliated, prefenting a three-fold r e£tangular cleavage. fragments cubical. Opcurs in large, coarfe, and fmall grained diftinft c °ncretions; alfo in broad prifmatic and thin and height and rather longiffi lamellar diltinft con ations. Tranflucent.
