1) Calcium mineral 2) Hexagonal mineral
Found on
https://www.crosswordclues.com/clue/sacrofanite
Sacrofanite is a rare silicate mineral that has the general formula of (Na,Ca)9(Si,Al)12O24(SO4,CO3,OH,Cl)4·n(H2O). It was approved as a mineral by the International Mineralogical Association in 1980. Its name comes from the Sacrofano Caldera in the Monti Sabatini from which it was discovered in Latium, Italy. ==Structure and optical properties==...
Found on
http://en.wikipedia.org/wiki/Sacrofanite
No exact match found.
