1) Iron mineral 2) Triclinic mineral
Found on
https://www.crosswordclues.com/clue/amarantite
Amarantite is an amaranth-red to brownish mineral with the general formula of Fe3+2O(SO4)2·7(H2O) or Fe3+(SO4)(OH)·3(H2O). The name comes from the Greek word αμάραντος which means amaranth, an imaginary undying red flower, in allusion to its color. Amarantite is triclinic, which means crystallographically, it has only one symmetry fold....
Found on
http://en.wikipedia.org/wiki/Amarantite
No exact match found.
