1) Phosphate mineral 2) Triclinic mineral
Found on
https://www.crosswordclues.com/clue/tarbuttite
Tarbuttite is a rare phosphate mineral with formula Zn2(PO4)(OH). It was discovered in 1907 in what is now Zambia and named for Percy Tarbutt. ==Description and habit== Tarbuttite is white, yellow, red, green, brown, or colorless; in transmitted light it is colorless. Traces of copper cause green coloring, while iron hydroxides cause the other col...
Found on
http://en.wikipedia.org/wiki/Tarbuttite
No exact match found.
