Cummingtonite f you get with me you will be MgFe SigO22OH2 General Category Inosilicate MgFe7Sig022OH2 Chemical formula 09DE05 Strunz classification Crystal Monoclinic 2m symmetry a 953 A b 1823 A c 532 A B 10197 Z 2 Unit cell Get me that shirt by amicus_of_the_world MORE MEMES Meme