At-A-Glance
Country of Origin
NJ
United States
Photos
Essential Information
Specimen ID
6381
Mineral Name
Stilpnomelane
Chemical Formula
K(Fe++,Mg,Fe+++)8(Si,Al)12(O,OH)27•n(H2O)
Subcollection
Franklin and Sterling Hill Suite
Additional Details
Specimen Number
F008
Notes for Researchers
81/15
Physical Description
Copper-colored mineral labeled native copper on slickensides is probably a stilpnomelane group mineral. Nice example of one of the late-stage hydrothermal minerals from the area.
Geographic Origin
Locality Nickname
Franklin, New Jersey
Locality Lat/Long
41.1220409, -74.5804378
Mining District
Franklin Mining District