1) Iron mineral 2) Lead mineral
Found on
https://www.crosswordclues.com/clue/cylindrite
Cylindrite is a sulfosalt mineral containing tin, lead, antimony and iron with formula: Pb3Sn4FeSb2S14. It forms triclinic pinacoidal crystals which often occur as tubes or cylinders which are in fact rolled sheets. It has a black to lead grey metallic colour with a Mohs hardness of 2 to 3 and a specific gravity of 5.4. It was first discovered in ...
Found on
http://en.wikipedia.org/wiki/Cylindrite
No exact match found.
