Minerals identify

Know how to recognize them

Iolite

Cyclosilicate

Cordierite (mineralogy) is a magnesium cyclosilicate. Iron is almost always present and a solid solution exists between Mg-rich cordierite and Fe-rich sekaninaite )2Al,Mg O A high-temperature polymorph, which is isostructural and has a random distribution of Al in the (Si 18 rings.

Identification

Color of mineral

Blue
Violet
Green
Brown
Yellow
Grey

Mohs scale ( mineral hardness )

7

Density ( specific gravity )

1.527
1.532
1.538

Luster ( interacts light )

Greasy
Vitreous

Crystal ( diaphaneity )

Orthorhombic