Jeffersonite

Jeffersonite is a dark green pyroxene mineral, a manganese zinc enriched variety of augite, chemical formula 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

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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 (calvonigrite) Romanèchite Tantalite Todorokite Umber

Phosphates

• Childrenite
• Graftonite
• Lithiophilite
• Natrophilite
• Purpurite
• Triplite
• Triploidite
• Zanazziite

Silicates

• Babingtonite
• 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 (tungstate)
• Hübnerite (tungstate)

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