Vitriol
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Vitriol is the general chemical name encompassing a class of chemical compounds comprising sulfates of certain metals – originally, iron or copper. Those mineral substances were distinguished by their
Woodcut print from the Berckwerck Buch (1580) by Georgius Agricola depicting mineral mining for vitriol
![Ceramic pharmacy jar for storing blue vitriol (vitriol bleu) for medical use (Museum of the Civil Hospices of Lyon [fr]; Hôtel-Dieu de Lyon)](https://upload.wikimedia.org/wikipedia/commons/thumb/3/37/Vitriol_Bleu_-_mus%C3%A9e_HCL_-_pot_pharmacie_-_St-Vincent_de_Paul.jpg/500px-Vitriol_Bleu_-_mus%C3%A9e_HCL_-_pot_pharmacie_-_St-Vincent_de_Paul.jpg)
Ceramic pharmacy jar for storing blue vitriol (vitriol bleu) for medical use (Museum of the Civil Hospices of Lyon [fr]; Hôtel-Dieu de Lyon)
Blue vitriol monocrystal
Iron sulfate heptahydrate sample
Copper(II) sulfate
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Copper sulfate is an inorganic compound with the chemical formula CuSO4. It forms hydrates CuSO4·nH2O, where n can range from 1 to 7. The pentahydrate, a bright blue crystal, is the most commonly enco
Vitriol
…copper. Those mineral substances were distinguished by their color, such as green vitriol for hydrated iron(II) sulfate and blue vitriol for hydrated copper(II) sulfate. These materials were found originally as crystals of sulfate minerals, formed by evaporation of groundwater that percolated through sulfide minerals…
Copper sulfate
Preparation of copper(II) sulfate by electrolyzing sulfuric acid, using copper electrodes
Lowering a copper etching plate into the copper sulfate solution
Anhydrous CuSO4