Orpiment

Orpiment is a deep-coloured, orange-yellow arsenic sulfide mineral. It is found in volcanic fumaroles, low-temperature hydrothermal veins, and hot springs and is formed both by sublimation and as a byproduct of the decay of another arsenic mineral, realgar. Orpiment takes its name from the Latin “gold” + “pigment” because of its deep-yellow colour. Orpiment was traded in the Roman Empire and was used as a medicine in China, even though it is very toxic. It has been used as fly poison and to tip arrows with poison.

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