Gives off dense white fumes, which are
partly deposited in the tube.

(3) on charcoal. Fuses, fumes strongly, forming a white
incrustation, and when the antimony is
nearly expelled a crimson one, a nearly pure
silver bead remains.

(4) in forceps. --

(5) in borax. The incrustation formed on charcoal gives an
antimony reaction.

(6) in mic. salt. As in borax.

(7) with carb. soda. As alone on charcoal.

(8) Special reactions. --

* * * * *

Mineral. Silver glance

Formula. AgS.

Behavior

(1) in glass-bulb. --

(2) in open tube. Gives off sulphurous acid.

(3) on charcoal. Gives off SO^{2} and is reduced to metallic
silver. If impure, a small quantity of slag
also remains.

(4) in forceps. --

(5) in borax. The residual slag (if any) obtained upon
charcoal gives an iron reaction.

(6) in mic. salt. As in borax.

(7) with carb. soda. As alone on charcoal. The alkaline mass gives
a sulphur reaction on polished silver.

(8) Special reactions. --

* * * * *

Mineral. Stephanite

Formula. [,Ag]^{6}[,,,Sb].

Behavior

(1) in glass-bulb. Decrepitates, fuses and gives a slight
sublimate of sulphide of antimony.

(2) in open tube. Fuses and gives off SO^{2} and dense white
antimonial fumes.

(3) on charcoal. Fuses and incrusts the charcoal with
antimonious acid, leaving Ag with some
antimony. If the flame be continued, a red
incrustation is formed and finally a bead of
pure silver remains surrounded by a small
slag.

(4) in forceps. --

(5) in borax. The residual slag obtained on the charcoal
gives an iron and copper reaction.

(6) in mic. salt. As in borax.

(7) with carb. soda. The silver is reduced and the antimony
passes off in dense fumes. The fused alkali