| Title | Siliceous taconite from Niwabik, Minnesota |
| Description | Siliceous taconite, Fe2O3, is a low-grade iron ore, a flintlike mineral usually containing less than 30% iron. Taconite is resistant to drilling and so due to the extraction of its contained metal, the rock was long considered worthless. |
| Location | USA ▹ Minnesota. Near Niwabik. |
| Photographer | Darla Sondrol. 2001-07-24. |
| Collection | University of North Dakota Mineralogy Collection #3465. |
| Key words | siliceous, taconite, Minnesota |
| Tech details | 393 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 1316 |
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