atomic number
melting point

1. Mix a small amount of coarsely powdered mineral sample with sodium carbonate flux, then place the mixture on a charcoal block, using the blowpipe, apply the reducing portion of the flame to the mixture; a bright bead of metallic silver will form on the charcoal.

2. Dissolve some powdered mineral sample in a small beaker containing concentrated nitric acid, then dilute the solution with distilled water, now add a few drops of HCl (or a small amount of NaCl) to the solution; all silver-bearing salts yield a white precipitate of AgCl when treated in this fashion; (the presence of AgCl is confirmed if the precipitate darkens when exposed to light and if it dissolves in ammonia).