1
Stage 1 of 3
rahj al-ghar
Arabic · medieval
"powdery arsenic mineral"
literally "powder of the mine," or "cave dust"
2
Stage 2 of 3
realgar
Medieval Latin · medieval
"arsenic sulfide mineral"
adopted into European alchemical and mineralogical texts
3
Stage 3 of 3
realgar
Middle English · 1390s
"red arsenic sulfide mineral"
entered English mineralogy for the red arsenic ore
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