/ £ IS MUTH - GLANCE. * 453 Internally the foliated fracture is- splendent; the radia ted fracture only shining. The fracture is perfect foliated, and the cleavages are parallel to the sides and to the short diagonal of a slight ly oblique rhomboidal prism; the latter cleavages are very distinct, the others less so; sometimes also the frac ture is narrow and promiscuous radiated. The fragments are indeterminate angular. The foliated varieties occur in large and coarse granu lar distinct concretions. It is soft and very soft. It soils. It is brittle, inclining to sectile. It is easily frangible. It is heavy. Specific gravity, 6.4672, lirisson; 6.131, Kirwdn. Chemical Characters. It melts in the flame of a candle. It is volatilised be fore the blowpipe, and deposites on the charcoal a yel-* fojv crust, which becomes white on cooling. Constituent Parts. Bismuth, 60 •• Sulphur, - - 40 100 Sage In Mem. de 1’Acad. d. Sc. 1782, p. 307. I Geognostic Situation. It occurs in veins, and is usually accompanied with na tive bismuth, grey cobalt-ore, cerite, sparry ironstone, T? f 3 arsenical-