1) Molybdenum mineral
Found on
https://www.crosswordclues.com/clue/drysdallite
Drysdallite is a rare molybdenum selenium sulfide mineral with formula Mo(Se,S)2. It crystallizes in the hexagonal system as small pyramidal crystals or in cleavable masses. It is an opaque metallic mineral with a Mohs hardness of 1 to 1.5 and a specific gravity of 6.25. Like molybdenite it is pliable with perfect cleavage. It was first described ...
Found on
http://en.wikipedia.org/wiki/Drysdallite
No exact match found.
