At-A-Glance
Country of Origin
NJ
United States
Photos
Essential Information
Specimen ID
1795
Mineral Name
Biotite
Mineral Variety
Caswellite
Chemical Formula
K(Mg,Fe++)3[AlSi3O10(OH,F)2
Subcollection
Franklin and Sterling Hill Suite
Additional Details
Specimen Number
008
Physical Description
Caswellite, orange-brown striated masses
Geographic Origin
Locality Nickname
Franklin, New Jersey
Locality Lat/Long
41.1220409, -74.5804378
Mining District
Franklin Mining District
Mine Name
Franklin Mine