Minerals identify

Know how to recognize them

Chlorite_group

Phyllosilicates

The chlorites are a group of phyllosilicate minerals. Chlorites can be described by the following four endmembers based on their chemistry via substitution of the following four elements in the silicate lattice; Mg, Fe, Ni, and Mn.

In addition, zinc, lithium, and calcium species are known. The great range in composition results in considerable variation in physical, optical, and X-ray properties. Similarly, the range of chemical composition allows chlorite group minerals to exist over a wide range of temperature and pressure conditions. For this reason chlorite minerals are ubiquitous minerals within low and medium temperature metamorphic rocks, some igneous rocks, hydrothermal rocks and deeply buried sediments.

The name chlorite is from the Greek chloros (χλωρός), meaning "green", in reference to its color. They do not contain the element chlorine, also named from the same Greek root.

Identification

Color of mineral

Green
Yellow
Red
White

Mohs scale ( mineral hardness )

2

The streak

Grey
Green

Density ( specific gravity )

1.57

Luster ( interacts light )

Vitreous
Pearly
Dull

Crystal ( diaphaneity )

Monoclinic