











Fine Mineral Specimens Over $50
- Availability
- Available
- Price
- $50.00
- Locality
- Keweenaw Co., Michigan, United States
- Formula
- Cu1-xAsx; x = 1/7
- Size
- 4.8 x 2 x 2 cm - Miniature
- Tagged
- copper
Heavy, dense metallic Algodonite mass. Rare.
- Availability
- Available
- Price
- $50.00
- Locality
- Freiberg dist., Erzgebirge, Saxony, Germany
- Formula
- FeAsS
- Size
- 3 x 3 x 1.5 cm - Thumbnail
- Tagged
- sulfide
- Special Info
- Antique Specimen
Cluster of Arsenopyrite crystals to 6mm with Quartz. Old specimen deaccessioned by the A.E. Seamun Museum.
- Availability
- Available
- Price
- $50.00
- Locality
- Majuba Hill mine, Pershing Co., Nevada, United States
- Formula
- CuFe3+2(AsO4)2(OH)2ยท4H2O
- Size
- 7 x 5 x 3 cm - Sm Cabinet
Lime green acicular sprays lining large vug.
- Availability
- Available
- Price
- $125.00
- Reduced Price
- $75.00
- Locality
- Bombay, Maharashta, India
- Formula
- Ca2Fe2+Fe3+Si5O14(OH)
- Size
- 6 x 2.5 x 2.5 cm - Sm Cabinet
Gorgeous, large, Babingtonite crystal to a whopping 1.7cm on spheroidal Prehnite with Quartz crystals.
- 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.