Vbsuviake. ^ ^ et .° n t ^ le i ater al planes. The furamit of c ated mmatlon is often more or Iefs deeply trun- Th ed 3 b u e t Ia u teral pIanCS are lightly longitudinally flreak- Th Plail£S acum ination are fmooth. Mother Cryft . aIsare mo .% and placed on one final! \ *° nn drufes > feldom imbedded : are and middle fized. ^en eia^- Purpace op t i le cr yltals alternates be- f ' Cllin R a t enmg and r P Iendcnt i internally it is glift. f ' ail(i refm 0us the luftre intermediate between vitreous >’ j t ^ Ure Pma ii grained uneven. Cret ions. WS a tendenc y 10 fmaI1 grained diltinft con- Tr- Patent Ucentj approaching fometimes to femitranf- v ^° t ’ u * not in a v ery high degree. S Pecjfi c articularl y heav 7- approaching to heavv. '^Sibe^ gravit 7“3.S7J, Werner—Of Vcfuvius 3,4:0, ^ 3>3^5 to 3,390, Klaproth—3,407, Hat/y. Chemical Char after s. fief l ° a ^Wln bI °7 P ' pe ic melts > w itbout addition, in- and faintly tranlluccnt glaft. Constituent
