Minerals identify

Know how to recognize them

Shigaite

Sulfate mineral

Shigaite is a mineral with formula NaAl3(Mn2+)6(SO4)2(OH)18·12H2O that typically occurs as small, hexagonal crystals or thin coatings. It is named for Shiga Prefecture The formula was significantly revised in 1996, identifying sodium as a previously unknown constituent.

Identification

Color of mineral

Yellow
Orange
Brown
Black

Mohs scale ( mineral hardness )

2

The streak

Yellow
White

Density ( specific gravity )

1.546

Luster ( interacts light )

Vitreous

Crystal ( diaphaneity )

Trigonal