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.