1) Lead mineral 2) Sulfide mineral
Found on
https://www.crosswordclues.com/clue/semseyite
Semseyite is a rarely occurring sulfosalt mineral and is part of the class of lead antimony sulfides. It crystallizes in the monoclinic system with the chemical composition Pb9Sb8S21. The mineral forms dark gray to black aggregates. ==Etymology and history== Semseyite was first described for an occurrence in the Felsöbánya mine in Baia Sprie, Ro...
Found on
http://en.wikipedia.org/wiki/Semseyite
No exact match found.
