IV.
  a.  Steatite [.Mg]^{6}[...Si]^{5} + 4[.H]
  c.  Gilbertite [...Si],[...Al=],[.Fe],[.Mg],[.H] Int. 
     Meerschaum [.Mg][...Si] + [.H] |
     Serpentine [.Mg]^{9}[...Si]^{4} + 6[.H] |
V.
  a.  Gismondine ([.Ca][.K])^{2}[...Si] + 2[...Al=][...Si] + 9[.H]
____________________________________________________________
____________

TABLE II.

_______________________________________________________

________________
|
Analcime      | If transparent becomes white and opaque when heated,
| but on incipient fusion resumes its transparency and
| then fuses to a clear glass.
|
Andalusite    | When powdered and treated with cobalt solution on
| charcoal, assumes a blue color.
|
Apophyllite   | Fuses to a frothy white glass.
|
Axinite       | Imparts a green color to the blowpipe flame, owing to
| the presence of boracic acid.  This reaction is
| especially distinct, if the mineral be previously mixed
| with fluorspar and bisulphate of potassa.
|
Beryl         | Sometimes gives a chromium reaction in borax and
| microcosmic salt.
|
Chabasite     | Fuses to a white enamel.
|
Chondrodite   | Evolves fluorine in the glass tube, both when heated
| alone and with microcosmic salt.  It sometimes also
| gives off a trace of water.
|
Chrysoberyl   | Is unattacked by carbonate of soda.  With nitrate of
| cobalt on charcoal the finely powdered mineral
| assumes a blue color.
|
Datholite     | Fuses to a clear glass and colors the flame green.
|
Diallage      | Frequently gives off water in small quantity.
|
Fuchsite      | Gives the chromium reaction with borax and microcosmic
| salt.
|
Gadolinite    | That from Hitteroe, if heated in a partially covered
| platinum spoon to low redness, glows suddenly and
| brilliantly.
|
Hauyne        | Affords the sulphur reaction both on charcoal and when
| fused with potassa.  It contains both sulphur and
| sulphuric acid.
|
Hypersthene   | As Diallage.
|
Kyanite       | As Andalusite.
|
Lapis Lazuli  | Fuses to a white glass, and when treated with carbonate
| of soda on charcoal, gives the sulphur reaction on
| silver.
|
Laumonite     | When strongly heated, exfoliates and curls up.
|
Lepidolite    | Colors the blowpipe flame crimson, from lithia; also
| gives the fluorine reaction with microcosmic salt.
|
Leucite       | Some varieties, when treated with cobalt solution,
| assume a blue color.
|
Meerschaum    | In the glass bulb frequently blackens and evolves an
| empyreumatic odor due to organic matter.  When this is
| burnt off, it again becomes white, and if moistened
| with nitrate of cobalt solution and heated, assumes
| a pink color.
|
Okenite       | Behaves as Apophyllite.
|
Olivine       | Some varieties give off fluorine, when fused with
| microcosmic salt.
|
Pectolite     | Similar to Apophyllite.
|
Petalite      | Imparts a slight crimson color to the flame, like
| Lepidolite.
|
Prehnite      | As Chabasite.