( 5°3 ) FOURTH SUB, SPECIE S. Peaftone. Erbfenftein.—Werner. La. pierre de pois, ou la pifolite, Broch. t. i. p. 555. External Characters. Its mod common colour is yellowifh white, which ioiTietimes approaches to fnow white ; from yellowilh ''■vhite it paffes into light yellowilh brown. Commonly maffive, feldom reniform. Internally it is dull. Fra&ure, when it can be obferved, even. Fragments in the great indeterminately angular f ^lunt edged. It is compofed of fpherically round diftindt con ations," which are coarfe and fmall grained, and ^ 0r netimes approach to fine grained; thefe are again Co mpofed of very thin and concentric curved lamel- kr concretions. Cpaque, or tranflucent on the edges. Soft, approaching to very loft, remarkably brittle. 3 t a Ver y
