Search Archived Mineral Specimens
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- Availability
- Sold
- Locality
- Londonderry Lithium deposit, Western Australia, Australia
- Formula
- Fe2+Nb2O6
- Size
- Thumbnail 2.5x2x2cm
A crystal with several natural faces and a termination. I am guessing this is Ferrocolumbite or Columbite-(Fe). Two of the edges show secondary, bevelled faces. An older tag with this specimen (see prov tab).
- Availability
- Sold
- Locality
- Etta mine, Pennington Co., South Dakota, United States
- Formula
- Fe2+Nb2O6
- Size
- Thumbnail 3x2.5x1.5cm
Tabular black single crystal with several crystal faces.
- Availability
- Sold
- Locality
- Ingersoll mine, Pennington Co., South Dakota, United States
- Formula
- Fe2+Nb2O6
- Size
- Cabinet 9.5x8x6.5cm
- Tagged
- ore mineral , pegmatite mineral
Large cabinet with black, bladed "Columbite-Tantalite" to 4.5cm in white cleavelandite matrix.
- Availability
- Sold
- Locality
- Etta mine, Pennington Co., South Dakota, United States
- Formula
- Fe2+Nb2O6
- Size
- Miniature 4x3.5x2cm
Thick tabular crystal with striated faces. There are full faces on the two broad sides.
- Availability
- Sold
- Locality
- Etta mine, Pennington Co., South Dakota, United States
- Formula
- Fe2+Nb2O6
- Size
- SmCabinet 8x6x4cm
- Tagged
- pegmatite mineral
Large specimen for the mineral with deep, typical striations for Columbite. There are many faces, though it is not a complete crystal. It is on some matrix which includes Albite and Quartz. It is one of the bigger specimens of Columbite you would ordinarily see on the market. The Etta mine is a very famous mine for pegmatite minerals, especially Spodumene "logs". The mine gained worldwide recognition in the 1880's for it's role in the tin mining hoax.
- Availability
- Sold
- Locality
- Etta mine, Pennington Co., South Dakota, United States
- Formula
- Fe2+Nb2O6
- Size
- SmCabinet 7.5x4x3cm
- Tagged
- pegmatite mineral , niobium
Heavy black specimen of mostly massive Columbite with a portion striated probably caused by growth against Albite(?).
