Arsenopyrite

#64575

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.

Arsenopyrite at Dakota Matrix Arsenopyrite at WebMineral Arsenopyrite at MinDat

Babingtonite with Quartz

#BAC65154

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.

Babingtonite at Dakota Matrix Babingtonite at WebMineral Babingtonite at MinDat

Baryte

#AH65786

Availability: Available
Price: $50.00

Locality: Homestake mine, Creede, Mineral Co., Colorado, United States
Formula: BaSO₄
Size: 14 x 11 x 10 cm - Cabinet

Incredible large bladed crystals to 9cm in a cluster.

Baryte at Dakota Matrix Baryte at WebMineral Baryte at MinDat

Betafite

#64434

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.

Betafite at Dakota Matrix Betafite at WebMineral Betafite at MinDat