5950 - Sphalerite

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
Associated Minerals
Calcite
Pyrite
Lennilenapeite
Fluorite
Associated Rock Matrix
Calcite
Specimen Number
096

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