Rare Mineral Specimens - search page

Availability

Sold

Locality

Chuquicamata mine, El Loa Prov., Antofagasta, Chile

Formula

Cu₃(IO₃)₆·2H₂O

Size

0.8 x 0.5 x 0.2 cm - Thumbnail

Tagged

copper

Special Info

Type Locality

Sugary green crystalline mass. Rare.

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

$60.00

Locality

Silver Crater mine, Bancroft, Ontario, Canada

Formula

(Ca,Na,U)₂(Ti, Nb,Ta)₂O₆Z(OH)

Size

2 x 1.5 x 1.8 cm - Thumbnail

Special Info

Radioactive!!

A double - two crystals. The smaller one is 1.1cm.

Availability

Available

Price

$45.00

Locality

Silver Crater mine, Bancroft, Ontario, Canada

Formula

(Ca,Na,U)₂(Ti, Nb,Ta)₂O₆Z(OH)

Size

1.5 x 1.5 x 1.5 cm - Thumbnail

Special Info

Radioactive!!

Smaller crystal with black faces.

Availability

Available

Price

$50.00

Reduced Price

$30.00

Locality

Silver Crater mine, Bancroft, Ontario, Canada

Formula

(Ca,Na,U)₂(Ti, Nb,Ta)₂O₆Z(OH)

Size

2 x 2 x 1.7 cm - Thumbnail

Special Info

Radioactive!!

Single crystal with interesting "hopper" growth on some faces.

Availability

Available

Price

$25.00

Featured

Featured in Special Editions

Locality

Esquire #7 claim, Big Creek, Fresno Co., California, United States

Formula

BaSi₂O₅·4H₂O

Size

2.5 x 1.5 x 1.5 cm - Thumbnail

Tagged

Ba Silicates, barium

Special Info

Type Locality

Striated and colorless Bigcreekite.