
1) Calcium mineral 2) Magnesium mineral
Found on
https://www.crosswordclues.com/clue/huntite

Huntite is a carbonate mineral with the chemical formula Mg3Ca(CO3)4. Huntite crystallizes in the trigonal system and typically occurs as platy crystals and powdery masses. ==History== The earliest known reference to huntite is a paper by George Faust from 1953 in which the discovery of a new mineral in Nevada was announced. Faust acknowledges tha...
Found on
http://en.wikipedia.org/wiki/Huntite
No exact match found.