Minerals identify

Know how to recognize them

Halloysite

Phyllosilicates,kaolinite-serpentine group

Halloysite is an aluminosilicate clay mineral with the empirical formula Al2Si2O5(OH)4. Its main constituents are oxygen (21.76%), aluminium (1.56%). Halloysite typically forms by hydrothermal alteration of alumino-silicate minerals. It can occur intermixed with dickite and other clay minerals. X-ray diffraction studies are required for positive identification. It was first described in 1826 and named after the Belgian Omalius d'Halloy.

Identification

Color of mineral

White
Grey
Green
Blue
Yellow
Red

Mohs scale ( mineral hardness )

2
2.5

Density ( specific gravity )

1.553
1.559
1.56

Luster ( interacts light )

Pearly
Waxy
Dull

Crystal ( diaphaneity )

Monoclinic