Minerals identify

Know how to recognize them

Cronstedtite

Silicate mineral

Cronstedtite is a complex iron belonging to the serpentine group of minerals. Its chemical formula is Fe2+ 2Fe3+ (Si,Fe3+ O 5)(OH) 4.

It was discovered in 1821 and named in honor of Swedish mineralogist (1722–1765). It has been found in Bohemia in the Czech Republic.

Cronstedtite is a major constituent of CM chondrites , a carbonaceous chondrite group exhibiting varying degrees of aqueous alteration. Cronstedtite abundance decreases with increasing alteration.

Identification

Color of mineral

Black
Brown
Green

The streak

Green

Density ( specific gravity )

1.72
1.8
1.8

Luster ( interacts light )

Metallic

Crystal ( diaphaneity )

Trigonal