1) Copper mineral
Found on
https://www.crosswordclues.com/clue/cyanotrichite
Cyanotrichite is a hydrous copper aluminium sulfate mineral with formula Cu4Al2[(OH)12|SO4]·2H2O, also known as lettsomite. Cyanotrichite forms velvety radial acicular crystal aggregates of extremely fine fibers. It crystallizes in the orthorhombic system and forms translucent bright blue acicular crystal clusters or drusey coatings. The Mohs har...
Found on
http://en.wikipedia.org/wiki/Cyanotrichite
No exact match found.
