At-A-Glance
Country of Origin
NJ
United States
Photos
Essential Information
Specimen ID
5950
Mineral Name
Sphalerite
Mineral Variety
Cleiophane
Chemical Formula
(Zn,Fe)S
Subcollection
Franklin and Sterling Hill Suite
Additional Details
Associated Minerals
Calcite
Pyrite
Lennilenapeite
Fluorite
Associated Rock Matrix
Calcite
Specimen Number
096
Physical Description
Multiple euhedral yellow-green sphalerite crystals on base of calcite crystals and massive white material, possibly also calcite. Calcite crystals are well formed rhombohedrons and brown in color, possibly iron bearing or containing fine pyrite inclusions. Pyrite is present as tarnished masses. Lennilenapeite may also be present as fine, olive-brown druses filling interstices between calcite crystals. The largest sphalerite crystal measures 18 by 14 mm and is nearly at the center of the top surface of the specimen. There are incomplete blue fluorite crystals on the back of the specimen. The specimen measures approximately 12 x 9 x 5 cm.
Geographic Origin
Locality Nickname
Franklin, New Jersey
Locality Lat/Long
41.1220409, -74.5804378
Mining District
Franklin Mining District
Mine Name
Franklin Mine