Color  white,  or  gray,  yellowish,  greenish,  bluish  red.
Lustre  vitreous  to  greasy.  Transparent  to  opaque.  H.  =
5-5-6.     G.  =2  55-2-62.
Composition,  (Na,,  KJ.Al^Og^Si^,  the  oxygen  ratio  being
1:3:4^.  An  analysis  afforded  Silica  44*0,  alumina  33-3,
FeOg,  MnOj  0*7,  lime  1-8,  soda  15-4,  potash  4  9,  water  0-2
=  100*3;  a  little  lime  is  usually  present.  B.B.  fuses  quietly
to  a  colorless  glass.  Decomposed  by  hydrochloric  acid,  and
the  solution  gelatinizes  easily  on  evaporation.
Named  from  the  Greek  nepheU,  cloud,  the  mineral  becom-
ing clouded  in  acid.  Includes  the  glassy  crystals  from  Ve-
suvius called  Sommite;  also  hexagonal  crystals  in  other
volcanic  rocks;  a  massive  variety,  of  greasy  lustre,  called
ElcBolite  from  the  Greek  eIaio7i,  oil.  Altered  crystals  are
in  part  the  mineral  Gieseckite.
Diff,  Distinguished  from  most  scapolites  and  feldspars
by  the  greasy  lustre  when  massive,  and  the  facility  with
which  it  gelatinizes  with  acids;  from  apatite  by  the  last
character,  and  also  its  greater  hardness.
Obs.  The  prominent  constituent  of  nephelindoleryte  or
nephelinyte,  and  phonolyte,  and  also  in  some  other  eruptive
rocks;  enters  into  the  constitution  of  miascyte,  zircon-
syenjrte,  and  some  metamorphic  rocks.  Among  the  localities
are  Vesuvius  and  C.  di  Bove,  in  Italy;  Katzenbuckel,  near


%91  DESCRIPTIOKS   OF   HINBRALS.
Heidelberg;  Anssig,  in  Bohemia;  and  as  elteolite,  Brevig,
Norway;  Siberia;  the  Ozark  Moantaine,  Arkansas;  Litch-
field, Maine.
CaneriniU.  Like  nephelile  in  cryBtaUizBtioii,  also  in  ctHnpo^ion,
except  the  presence  of  some  carbonates  and  usually  water;  color  -whiit,
gray,  yellow,  green,  blue,  or  reddish;  H.  —  5-6;  6  —  2-4-3-6;  <.ii
account  of  the  carbonatea  it  effervesces  in  acids.  B.B.  fncea  viry
easily.
Occurs  in  crystalliDe  rocks  at  Hiask  Id  the  Ural;  in  Norway;  Tran-
l^lvania;  and  at  Litchfield  in  Maine,  with  etteolile  and  sodalix.
