V.I.T.R.I.O.L (Masonic/Alchemical Motto)

In chemistry, vitriol is iron or copper sulfate salts and their derivative, sulfuric acid. The name comes from the Latin for “glassy,” after the resemblance of iron sulfate to shards of green glass. Vitriol is symbolized alchemically as the “green lion,” a poisonous substance that appears when metal…

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Source: V.I.T.R.I.O.L (Masonic/Alchemical Motto