Alchemy Alphabet: BLUE VITRIOL (Cupric Vitriol, Vitriol of Cyprus), Copperas of Cuprum, Roman Vitriol, Bluestone. Copper sulphate: [CuSO₄•5H₂O].

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Alchemy Alphabet: BLUE VITRIOL (Cupric Vitriol, Vitriol of Cyprus), Copperas of Cuprum (Couperose de cuivre), Roman Vitriol, Bluestone; also: Chalcanthum (Malachite). Copper sulphate: [CuSO₄•5H₂O].

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