armangite

The story

1. Proto-Indo-European*ǵʰelh₃-
2. Proto-Indo-European*ǵʰl̥h₃enyom
3. Proto-Indo-Iranian*ȷ́ʰr̥Hanyam
4. Proto-Iranian*jr̥Hanyam
5. Old Median*zaranyam
6. Old Median*kā
7. Old Median*zaraniyakā
8. Middle Persian*zarnīk
9. Classical Syriacܙܪܢܝܟܐ (zarnīḵā)
10. Arabicالزَرْنِيخ (az-zarnīḵ)
11. Medieval Greekἀρσενικόν (arsenikón)
12. Latinarsenicum
13. Middle Frencharsenic
14. Middle Englisharsenik
15. Englisharsenic
16. Ancient GreekΜάγνης (Mágnēs)
17. Ancient GreekΜαγνησία (Magnēsía)
18. LatinMagnēsia
19. Latinmagnēsius
20. Medieval Latinmagnēsia
21. Italianmanganese
22. Frenchmanganèse
23. Englishmanganese
24. English todayarmangite

Blend of arsenic + manganese + -ite.