(2) in open tube. Evolves SO and becomes white or yellow if containing iron. (3) on charcoal. V. In the reducing flame incrusts the charcoal with ZnO; also with CdO, if that metal be present. (4) in forceps. -- (5) in borax. The roasted mineral gives a zinc reaction, and sometimes a slight iron reaction. (6) in mic. salt. As in borax. (7) with carb. soda. As alone on charcoal. Moreover colors the flame blue. The fused alkali gives a S reaction on silver. (8) Special reactions. -- * * * * * Mineral. Red oxide of zinc Formula. [.Zn]. Behavior (1) in glass-bulb. -- (2) in open tube. -- (3) on charcoal. In the reducing flame forms a thin incrustation of oxide of zinc on the charcoal. (4) in forceps. V. (5) in borax. Generally gives a manganese and slight iron reaction in addition to that of zinc. (6) in mic. salt. As in borax. (7) with carb. soda. On charcoal, forms a thick incrustation of ZnO. (8) Special reactions. With carbonate of soda and nitre on platinum foil gives manganese reaction. * * * * * Mineral. Electric calamine Formula. 2[.Zn]^{3}[...Si] + 3[.H] Behavior (1) in glass-bulb. Gives off water and becomes white and opaque. (2) in open tube. -- (3) on charcoal. -- (4) in forceps. V. (5) in borax. Dissolves to a clear glass, which cannot be rendered opaque by the intermittent flame. (6) in mic. salt. Dissolves to a clear glass, which becomes opaque on cooling. Silica remains insoluble. (7) with carb. soda. With carbonate of soda alone is infusible. With 2 parts of alkali and 1 of borax fuses to a glass and sets free [.Zn], which incrusts the charcoal. (8) Special reactions. -- * * * * * Mineral. Calamine Formula. [.Zn][..C]. Behavior (1) in glass-bulb. Gives off CO^{2} and becomes opaque. (2) in open tube. -- (3) on charcoal. As the red oxide. Sometimes also gives a lead incrustation. (4) in forceps. V. (5) in borax. Gives a zinc reaction and frequently an iron and manganese reaction. (6) in mic. salt. As in borax. (7) with carb. soda. Forms a thick incrustation of zinc, sometimes also of [.Pb] and [.Co]. (8) Special reactions. Dissolves with much effervescence in cold acid.