(2) in open tube. 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 gives the sulphur reaction on silver. (8) Special reactions. -- * * * * * Mineral. Pyargyrite Formula. [,Ag]^{3}[,,,Sb]. Behavior (1) in glass-bulb. Sometimes decrepitates, fuses readily, and, when strongly heated, gives a red sublimate of SbS^{3}. (2) in open tube. As in the preceding.