'._('einklappen').'
 

Cummingtonite - Kalgoorlie-Boulder City

Collectors Summary

Chemical Formula ☐(Mg,Fe2+,Mn2+)7Si8O22(OH)2
Color dunkelgrün
Streak color weiß
Hardness (Mohs) 5.00 - 6.00
Solubility +++ HF, - HCl
Crystal System monoklin, C2/m