Recently Released Special Editions
Fine Minerals from Cornwall, England
Our second Special Edition on Cornish Minerals will feature a wide array of colorful, historic specimens. Minerals of Cornwall, England are highly sought after not only for their beauty, but for their diversity and historic appeal. To learn more about Cornish minerals please read our article on this fabulous locality - A Summary of the Minerals, Geology and Mines of Cornwall, England. Learn more about Special Editions. View Upcoming Special Editions. To get NOTIFIED click here to get the exclusive DAKOTA MATRIX NOTIFIER.
Autunite
- Sold
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- Locality
- Merrivale quarry, Dartmoor, Devon, England
- Formula
- Ca(UO2)2(PO4)2·10-12H2O
- Availability
- Sold
- Size
- 7 x 5 x 1.5 cm - Sm Cabinet
- Tagged
- phosphate
Though not strickly Cornwall, this specimen from Devon is a nice Autunite with coverage of tiny yellow crystals on granitic matrix.
Autunite
- Formula
- Ca(UO2)2(PO4)2·10-12H2O
- Crystal System
- Tetragonal
- Crystal Habit
- Tabular, Micaceous, Foliated
- Cleavage
- Perfect, Poor, Poor
- Luster
- Vitreous - Pearly
- Color
- yellow, pale yellow, lemon yellow, greenish yellow, pale green
- Streak
- pale yellow
- Class
- Tetragonal - Ditetragonal Dipyramidal
- Fracture
- Uneven
- Hardness
- 2-2.5
- Collection
- Phillips Collection
- Mineralpedia
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- On Dakota Matrix
- Previously Sold Autunite
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- Mindat
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Bindheimite
- Sold
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- Locality
- Pengenna Mine, St Kew, Cornwall, England
- Availability
- Sold
- Size
- 6 x 3.5 x 3 cm - Sm Cabinet
Light yellow masses on quartz.
Bindheimite
- Formula
- Pb2Sb2O6(O,OH)
- Crystal System
- Isometric
- Crystal Habit
- Encrustations, Earthy, Encrustations
- Cleavage
- None, None, None
- Luster
- Greasy (Oily)
- Color
- yellow, greenish yellow, green, brownish white, grayish white
- Streak
- light greenish brown
- Class
- Isometric - Hexoctahedral
- Fracture
- Conchoidal
- Hardness
- 4-5
- Collection
- Phillips Collection
- Mineralpedia
- View Bindheimite
- On Dakota Matrix
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Botallackite
- Sold
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- Locality
- Botallack mine, St. Just dist., Cornwall, England
- Formula
- Cu2Cl(OH)3
- Availability
- Sold
- Size
- 5 x 3 x 3 cm - Miniature
- Tagged
- halide , copper
- Special Info
- Type Locality
Tiny blush green platelets of Botallackite with deep blue spherulites of Connellite. Old Barsto label. A good, rich specimen from the type locality.
Botallackite
- Formula
- Cu2Cl(OH)3
- Crystal System
- Monoclinic
- Cleavage
- Perfect, None, None
- Color
- blue green, green, light blue green, light green
- Streak
- light green
- Class
- Monoclinic - Prismatic
- Hardness
- -
- Collection
- Phillips Collection
- Special Info
- Type Locality
- Mineralpedia
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Ceruleite
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- Locality
- Wheal Gorland, St. Day dist., Cornwall, England
- Formula
- Cu2Al7(AsO4)4(OH)13·12H2O
- Availability
- Sold
- Size
- 3.5 x 4 x 4 cm - Miniature
- Tagged
- arsenate , copper
Sample of Ceruleite from the famous Wheal Gorland. This sample shows really nice color and habit, with a rounded surface visible inside of pockets within the quartz matrix. Small crystals of Cassiterite are seen inside of one face, with a fibrous radiating structure composed of an unidentified mineral near by which closely matches Liskeardite visually. Small acicular crystals of Olivenite are visible near the Ceruleite. All in all, an interesting sample with a host of different species from this notable location. Old Barstow label.
Ceruleite
- Formula
- Cu2Al7(AsO4)4(OH)13·12H2O
- Crystal System
- Triclinic
- Color
- blue, deep blue
- Streak
- bluish white
- Class
- Triclinic - Pinacoidal
- Hardness
- 5-6
- Collection
- Phillips Collection
- Mineralpedia
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- On Dakota Matrix
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- On Dakota Matrix
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- Mindat
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