atomic number
melting point

1. Mix a small amount of finely powdered mineral with sodium metaphosphate flux (borax flux can also be used and will produce nearly identical results), then apply the blowpipe flame to the mixture until it forms a red-hot bead; in the oxidizing portion of the flame, the fused bead will take on a deep yellow color that fades upon cooling; in the reducing portion of the flame, the fused bead will be a dirty green color which clears up to a fine, translucent green as it cools.

2. Dissolve a small quantity of powdered mineral sample in a solution of hydrochloric acid, then add a few drops of H2O2; vanadium-bearing compounds will impart a reddish-brown color to the solution when treated in this fashion.