At-A-Glance
Country of Origin
NJ
United States
Contributors
Archibald MacMartin
Photos
Essential Information
Specimen ID
1935
Mineral Name
Pyroxene Group
Mineral Variety
Jeffersonite
Chemical Formula
Subcollection
Archibald M. MacMartin
Additional Details
Specimen Number
023
Physical Description
Jeffersonite. Dark green-gray etched dull crystals
Jeffersonite is a manganese zinc variety of augite (Ca(Mn,Zn,Fe)Si2O6)
Geographic Origin
Locality Nickname
Franklin, New Jersey
Locality Lat/Long
41.1220409, -74.5804378
Mining District
Franklin Mining District
Mine Name
Franklin Mine