Inventory Search for Mineral Specimens and Products

Astrophyllite

#57854

Availability: Available
Price: $55.00
Reduced Price: $35.00

Locality: Eveslogchorr Mt, Khibiny Massif, Kola Peninsula, Russia
Formula: K₂NaFe²⁺₇Ti₂(Si₄O₁₂)₂O₂(OH)₄F
Size: 5 x 4.5 x 1.5 cm - Miniature

Deep amber-red elongated and platy crystals to 1.5cm.

Astrophyllite at Dakota Matrix Astrophyllite at WebMineral Astrophyllite at MinDat

Beryl in Albite with Muscovite

#DL62165

Availability: Available
Price: $75.00
Reduced Price: $30.00

Locality: Bennett quarry, Buckfield, Oxford Co., Maine, United States
Formula: Be₃Al₂Si₆O₁₈
Size: 7 x 6 x 4 cm - Sm Cabinet
Tagged: beryllium, pegmatite mineral

Light green etched Beryl in white Microcline with pockets of Cookeite and crystals of apatite.

Beryl at Dakota Matrix Beryl at WebMineral Beryl at MinDat

Betafite

#64438

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.

Betafite at Dakota Matrix Betafite at WebMineral Betafite at MinDat

Billingsleyite

#61076

Availability: Available
Price: $75.00
Reduced Price: $45.00

Locality: Clara mine, Wolfach, Schwarzwald, Baden-Wurttemberg, Germany
Formula: Ag₇AsS₆
Size: .9 x .6 x 1 cm - Thumbnail
Tagged: sulfide, silver

There are at least three individual crystals on this specimen. All are in the range of 0.1 to 0.2mm in size. Each are blocky and dull black and are associated with colorless Fluorite. Billingsleyite is a fairly rare mineral and is found at only 12 localities acrsos the world.

Billingsleyite at Dakota Matrix Billingsleyite at WebMineral Billingsleyite at MinDat