Affords an intense amethyst color, which on cooling becomes
violet. A large quantity of the oxide produces an apparently
black bead, which however, if pressed flat, is seen to be
transparent.

in the reducing flame.

The colored bead becomes colorless. With a large amount of the
oxide, this reaction is best obtained upon charcoal, and is
facilitated by the addition of tin foil.

Behavior with Mic. Salt on Platinum wire

in the oxidizing flame.

With a considerable quantity of oxide an amethyst color is
obtained, but never so dark as in borax. With but little oxide a
colorless bead is obtained, in which, however, the
amethyst-color may be brought out by adding a little nitre.
While the bead is kept fused, it froths and gives off bubbles of
gas.

in the reducing flame.

The colored bead immediately loses its color, either on platinum
wire or on charcoal. After the reduction the fluid bead remains
still.

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