Zeolit;?. 219 Externally its luftre is fplendent and intermediate between pearly and vitreous. Internally it is Ihining* Fracture very impferfe&ly foliated, cleavage three- ^°id, and the folia interfecl each other under r ight angles, and parallel with the planes of the Cu be. Sometimes alfo paffes into coarle grained un even. Fragments indeterminately angular, approaching to cubical. Has a tendency to coarfe and fine grained diftincfe concretions. ■Alternates from tranflucent to tnanfparent. Semi-hard, but in a higher degree than the pre-» Ce ding fubfpecies*. Not particularly heavy, specific gravity 2,716, Hauy. . Chemical Characters. Before the blow pipe it intumefces like borax, and Utelts eafily into a cellular glafs, and during fufion c 'uits a phofphoric light. With acid it forms a jellyf. Scratches glafs flightly.—Hauy. t It is didinguifhed from leuzite, by its eafy fufibilitv. 2 F f Obfervation, t