Minerals identify

Know how to recognize them

Zinnwaldite

Phyllosilicate mineral

Zinnwaldite, K (AlSi )2, potassium lithium iron aluminium silicate hydroxide fluoride is a silicate mineral group. The IMA status is as a series between siderophyllite (KFe2Al(Al2Si2)O10(F,OH)2) and polylithionite (KLi2AlSi4O10(F,OH)2) and not considered a valid mineral species.

Identification

Color of mineral

Grey
Brown
Yellow
Violet
Green

Mohs scale ( mineral hardness )

3.5

Density ( specific gravity )

1.565
1.605
1.605

Luster ( interacts light )

Pearly
Vitreous

Crystal ( diaphaneity )

Monoclinic