Minerals identify

Know how to recognize them

Pargasite

Inosilicates

Pargasite is a complex inosilicate mineral of the amphibole group with formula NaCa2(Mg4Al)(Si6Al2)O22(OH)2.

It was first described for an occurrence in Pargas , Finland

It occurs in high temperature regional metamorphic rocks and in the skarns around igneous volcanic rocks rocks.

Pargasite is the main water-storage site in the uppermost mantle, however it becomes unstable at depths greater than 90 km (56 mi). This has significant consequences for the water storage capacity, and the solidus temperature of the lherzolite of the upper mantle

It is used as a gemstone.

Identification

Color of mineral

Green
Grey
Black
Brown

Mohs scale ( mineral hardness )

5

Density ( specific gravity )

1.63
1.64
1.65

Luster ( interacts light )

Vitreous

Crystal ( diaphaneity )

Monoclinic