Fine Mineral Specimens Over $50
- Availability
- Available
- Price
- $75.00
- Locality
- Silver Crater mine, Bancroft, Ontario, Canada
- Formula
- A2(Ti,Nb)2O6Z
- Size
- 2 x 2 x 2 cm - Thumbnail
- Special Info
- Radioactive!!
Once known simply as the mineral species, Betafite, now in a complex mineral group called the Betafite group, which belongs to the super group of Pyrochlores with a complicated nomenclature. Compositionally, Betafites are oxides of titanium and niobium with variable subtitutions of cations uranium and calcium in the A position and variable amounts of anions O, OH, H2O, or F in the Z position.
This specimen, like the others show the cubic and octahedral forms with sharp edges.
- Availability
- Available
- Price
- $75.00
- Locality
- Harding mine, Taos Co., New Mexico, United States
- Formula
- CaLiAl2(Si2BeAl)O10(OH)2
- Size
- 6 x 6 x 3.5 cm - Sm Cabinet
Bityite is a rare beryllium-lithium mica shown here as colorless plates to 5mm in biotite.
- Availability
- Sold
- Size
- Not Specified
- Tagged
- maps books, black hills, history, maps, books, book, map, CD, DVD
Black Hills Ghost Town & Ghost Mine Maps
by Dale Baiety
This DVD-R "data" disk contains topographical maps and aerial photo images that cover the Black Hills of South Dakota from north of Spearfish, SD, to near the South Dakota/Nebraska border. The east to west map coverage spans from east of Rapid City to the Wyoming border.
365,420 aerial photo images create a seamless mosaic that zooms from 64-meter to 1-meter resolution. 27.760 topographical map segments allow zooming from 32-meter to 4-meter resolution. The cursor shows latitude/longitude information for any location. Waypoint overlays identify 386 Black Hills ghost/historic towns and 999 Black Hills ghost mines.
A GPS is not needed to use the maps, but if the user does have a GPS, the included USAPhotoMaps program allows transfer of data in/out of Windows based computers. A laptop computer will supply real time on screen tracking of most GPS units. A Windows computer system with DVD-R "data" drove amd 2.4 Gig of hard drive space is required to install the program on your computer.
- Availability
- Available
- Price
- $495.00
- Locality
- Carn Brea, Redruth, Cornwall, England
- Formula
- Cu5FeS4
- Size
- 6 x 4.5 x 4 cm - Sm Cabinet
- Tagged
- sulfide, copper
Iridescent blue Bornite crystals from important Cornish mine.
- Availability
- Available
- Price
- $60.00
- Locality
- Pribram, Bohemia, Czech Republic
- Formula
- CuPbSbS3
- Size
- 6 x 5 x 4 cm - Sm Cabinet
- Tagged
- sulfide, copper
A 1.3cm Bournonite crystal in matrix.
- Availability
- Sold
- Locality
- Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States
- Formula
- (Fe3+)24AlO6(PO4)17(OH)12ยท75H2O
- Size
- 7 x 4 x 2 cm - Sm Cabinet
- Tagged
- phosphate
This specimen is covered with yellow to golden brown spheroidal crystal groups to 1mm of radiating Cacoxenite crystals. A superb specimen from this important mineral locality.
