Jeffersonite

Jeffersonite is a dark green pyroxene mineral, a manganese zinc enriched variety of augite (Ca(Mn,Zn,Fe)Si₂O₆), sometimes compared to aegirine. Jeffersonite is not a recognized mineral name.

It occurs in pegmatites where it can form crystals up to 30 cm (12 in) long and in the contact metamorphic zone between limestone and various intrusive rocks. It is reported from the Sterling Hill Mine, Franklin, New Jersey, in South Australia and Sweden.

External links

Mindat
Abandoned Mines of New Jersey

Manganese minerals

Borates

Sussexite
Tusionite

Carbonates

Ankerite
Kutnohorite
Rhodochrosite
Manganoan Calcite

Oxides

Simple	Hausmannite Manganite Manganosite Nsutite Pyrolusite

Mixed	Birnessite Bixbyite Ferrocolumbite Ferrotantalite Galaxite Jacobsite Manganotantalite Psilomelane Romanèchite Tantalite Todorokite Umber

Phosphates

Childrenite
Graftonite
Lithiophilite
Natrophilite
Purpurite
Triplite
Triploidite
Zanazziite

Silicates

Babingtonite
Bixbite
Braunite
Brownleeite
Calderite
Chloritoid
Eudialyte
Glaucochroite
Jeffersonite
Knebelite
Ottrelite
Piemontite
Pyroxferroite
Rhodonite
Spessartine
Sugilite
Tephroite
Zakharovite
Zircophyllite

Sulfides

Alabandite
Hauerite
Rambergite

Other

Axinite (borosilicate)
Geigerite (arsenate)
Manganese nodule (various)
Samsonite (Sulfosalt)
Zincobotryogen (sulfate)
Wolframite
Hübnerite

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