Mineral Details for This Site.



Arsenolite

Colour: White
Formula: As2O3
Composition: Arsenious oxide
Crystal System: Cubic
Hardness:
Streak: White
Lustre: Earthy
Locations mentioned on this site: S. Bedford Mine, Devon
Other features:


Arsenopyrite

Colour: Silver
Formula: FeAsS Crystal System: Monoclinic or pseudo orthorhombic
Hardness:
Streak: grey
Lustre: Metallic
Locations mentioned on this site: Other features:


Autunite

Colour: Fluorescent yellow/green
Formula: Ca(UO2)2(PO4)2·10-12H2O
Composition: Calcium uranium phosphate
Crystal System: tetragonal
Hardness:
Streak: Yellow
Lustre: Crystalline
Locations mentioned on this site: Autun, France
Other features: Radioactive and very strongly UV fluorescent (yellow)


Becquerelite

Colour: Amber/Orange/Yellow when earthy
Formula: Ca(UO2)6O4(OH)6·8H2O
Composition: Calcium hydroxy uranate
Crystal System: orthorhombic
Hardness:
Streak: Yellow/Amber
Lustre: Crystalline
Locations mentioned on this site: Tsumeb, Zaire
Other features: Radioactive



Cuprosklodowskite

Colour: green/yellow green
Formula: (H3O)2Cu(UO2)2(SiO4)2·2H2O
Composition: Copper uranyl silicate
Crystal System: Triclinic
Hardness:
Streak: Yellow/Green
Lustre: Crystalline/Massive
Locations mentioned on this site: Johanngeorgenstadt East Germany.
Other features: Radioactive



Curite

Colour: yellow/brown
Formula: Pb2U5O17·4H2O
Composition: Lead uranium oxide
Crystal System: orthorhombic
Hardness:
Streak: Yellow
Lustre: Earthy
Locations mentioned on this site: Katanga, Zaire
Other features: Radioactive



Guilleminite

Colour: Canary yellow
Formula: Ba(UO2)3(SeO3)2(OH)4·3H2O
Composition: Barium uranyl hydroxy selenate
Crystal System: orthorhombic
Hardness:
Streak: yellow-cream
Lustre: Crystalline, earthy
Locations mentioned on this site: Shinkolobwe, Shaba, Zaire
Other features: Radioactive



Haematite

Colour: Black to brown
Formula: Fe2O3
Composition: Iron Oxide
Crystal System: Hexagonal
Hardness: 5.5-6.5
Streak: Dark Cherry Red
Lustre: Metallic or earthy
Locations mentioned on this site: Great Rock Mine, Devon
Other features:



Hemimorphite

Colour: Pale blue/white
Formula: Zn4Si2O7(OH)2·H2O
Composition: Zinc silicate
Crystal System: orthorhombic
Hardness:
Streak: White
Lustre:
Locations mentioned on this site: S. Bedford Mine, Devon
Other features: mildly UV fluorescent (white).


Magnetite

Colour: Black to brown
Formula: Fe+2Fe2+3O4
Composition: Iron Oxide
Crystal System: Cubic
Hardness:
Streak:
Lustre: submetallic or earthy
Locations mentioned on this site: Haytor Mine, Devon
Other features: Magnetic


Malachite

Colour: Green
Formula: Cu2(CO3)(OH)2
Composition: Basic copper carbonate
Crystal System: Monoclinic
Hardness:
Streak: green
Lustre: Crystalline or earthy
Locations mentioned on this site: Shinkolobwe,Shaba,Zaire
Other features:


Rhodochrosite

Colour: Pink
Formula: MnCO3
Composition: Manganese Carbonate
Crystal System: trigonal (rhombohedral)
Hardness:
Streak: White
Lustre:
Locations mentioned on this site: Romania
Other features:



Schoepite

Colour: Yellow
Formula: UO2.2H2O
Composition: hydrated uranium oxide
Crystal System: orthorhombic
Hardness:
Streak: Yellow
Lustre: Crystalline, earthy
Locations mentioned on this site: Shinkolobwe,Shaba, Zaire
Other features: Radioactive


Uraninite

Colour: Black
Formula: UO2
Composition: Uranium dioxide
Crystal System: cubic
Hardness:
Streak: Black
Lustre: Crystalline, earthy
Locations mentioned on this site: Tsumeb, Zaire
Other features: Radioactive

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Uranospinite

Colour: Fluorescent yellow/green
Formula: Ca(UO2)2(AsO4)2·10H2O
Composition: Calcium uranium arsenate
Crystal System: tetragonal
Hardness:
Streak: yellow
Lustre: Crystalline, earthy
Locations mentioned on this site: Kingswood Mine adit, Devon.
Other features: Radioactive and UV fluorescent (yellow)



Uranophane

Colour: slightly UV Fluorescent yellow/green
Formula: (H3O)2Ca(UO2)2(SiO4)2·3H2O
Composition: Hydrated calcium uranium silicate
Crystal System: monoclinic
Hardness:
Streak: yellow
Lustre: Crystalline
Locations mentioned on this site: Shinkolobwe,Shaba, Zaire
Other features: Radioactive and UV fluorescent (yellow)



Vandenbrandeite

Colour: blue/green black
Formula: Cu(UO2)(OH)4
Composition: Copper uranyl hydroxide
Crystal System: triclinic
Hardness:
Streak: blue green
Lustre: Crystalline, earthy
Locations mentioned on this site: Shinkolobwe, Shaba, Zaire
Other features: Radioactive



Zeunerite

Colour: Fluorescent green
Formula: Cu(UO2)2(AsO4)2·10-16H2O
Composition: Copper uranium arsenate
Crystal System: tetragonal
Hardness:
Streak: Green
Lustre: Crystalline, earthy
Locations mentioned on this site: Kingswood Mine adit, Devon.
Other features: Radioactive

Last updated 13 Oct 2001 by aardvark.nest.