A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Gahnite and sphalerite from Franklin, New Jersey |
|---|---|
| Description | This sample contains mostly dark brown gahnite, ZnAl2O4. If you look closely you can see a hint of gahnite's tendency to form octahedral (8 sided) crystals. The specimen also contains lots of brownish (harder to see, slightly lighter colored) sphalerite, (Zn,Fe)S, on top of the gahnite. Also seen in this photo is a small amount of the less common, reddish, variety of sphalerite that is sometimes called ruby blende. This sample, 11 cm across, comes from a well known mining district in New Jersey. |
| Location | USA ▹ New Jersey. Near Franklin. |
| Photographer | Nessa Eull. 2001-07-10. |
| Collection | University of North Dakota Mineralogy Collection #178. |
| Key words | ruby blende, sphalerite, gahnite, New Jersey |
| Tech details | 774 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 1087 |
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