Metal salts can be completely extracted from metals. They sometimes vegetate in the fire, in certain operations, or allow themselves to crystallize slowly, by means of acid solutions.
EXPERIENCE
These salts are most often presented in tight, shiny, celadon green crystals, very friable, and which, on the outside, offer a great deal of analogy with the benzoic crystalline efflorescences, dissolved in water and recrystallized, hiding in their inside a coloring substance.
Either a solution in which appropriate reagents would reappear, one by one, the elements in suspension.
These same salts can also be in the form of a colored earth. They can be recognized by their red color in a well calcined pewter lime.
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