Minerals identify

Know how to recognize them

Jamesonite

Sulfosalt

Jamesonite is a sulfosalt mineral , iron with formula Pb4FeSb6S14. With the addition of manganese it forms a series with benavidesite It is a dark grey metallic mineral which forms acicular prismatic monoclinic crystals. It is soft with a Mohs hardness of 2.5 and has a specific gravity It is one of the few sulfide minerals to form fibrous or needle like crystals. It can also form large prismatic crystals similar to stibnite with which it can be associated. It is usually found in low to moderate temperature hydrothermal

It was named for Scottish mineralogist Robert Jameson (1774–1854). It was first identified in 1825 in Cornwall, England It is also reported from South Dakota , US; Zacatecas.

Identification

Color of mineral

Grey
Black

The streak

Black

Luster ( interacts light )

Metallic

Crystal ( diaphaneity )

Monoclinic