Grenatite. 77 Fra&ure intermediate between fmall grained un- eve n, and imperfe&ly.conchoidal *. Fragments indeterminately angular. ^ery often opaque, fometimes tranflucent, and very rarely femitranfparent. Hard f. brittle. . . Fafily frangible. Hot particularly heavy. Specific gravity—3,286. Hatty. Chemical Characters. Infufxble before the blow pipe. Constituent Parts. Silica 0,33 Alumina 0,44 Lime 0,0384 Oxyd of iron, 0,13 —■— of manganefe o,oi Vattquelin, J. d. M. N. 53. p. 453. tl le remarks that it is impcrfeftly foliated, and that S^ine^ a ' e ^ ar ^ Ct w ‘ t ^ 1 t l* c ax ‘ s I hut in other direftions fine 1' ’ Uncvcn ’ an ^ fotnctimcs conchoidal. Broch. t. 2. p. 497- 'itches quarts feebly. Hauy. Geognostic
