Minerals identify

Know how to recognize them

Galaxite

Oxide mineral,spinel group,normal spinel structural group

Galaxite, also known as 'mangan-spinel' is an isometric mineral of oxides Mn2+ Al 2O 4.

Galaxite is the manganese (Mn) rich endmember of the aluminium. Divalent (Mg) readily substitute for the manganese in the crystal structure. Trivalent iron may also substitute for the aluminium. Thus, reflecting most natural samples, the formula may be better represented as (Mn,Fe2+,Mg)(Al,Fe3+ ) 2O 4.

Galaxite generally occurs as small granular aggregates with a red-brownish tone. It has a vitreous luster and leaves a brownish-red streak. It is rated 7.5 on the Mohs Scale

It was first described in 1932 for an occurrence at Bald Knob, Alleghany County, North Carolina near its namesakes, the town of Galax, Virginia galax

It occurs in carbonate-rich metamorphosed manganese ore deposits. It occurs associated with alleghanyite, spessartine, manganhumite and alabandite in the Bald Knob area. Associated minerals include katoptrite , manganostibite, manganhumite and manganosite in the Brattfors mine area of Nordmark

It is sometimes used as a gemstone.

Identification

Color of mineral

Black
Red
Brown
Yellow

Mohs scale ( mineral hardness )

7.5

The streak

Brown

Density ( specific gravity )

1.923

Luster ( interacts light )

Vitreous

Crystal ( diaphaneity )

Cubic