Coal blend
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About Coal blend
Colour:
Jet-black
Lustre:
Vitreous
Hardness:
2 - 3
Crystal System:
Amorphous
Coal blend, in Norwegian, kullblende, is a complex of carbon-hydrogen-compounds with traces of nitrogen and sulphur. Probably a variety of Pyrobitumen.
The name is used since Schumacher (1801) as a designation for an "anthracite"-like mineraloid of hydrothermal origin that occurs in the Kongsberg Silver Mines in Norway, and closeby, near and inside the Oslo Region (a graben area) in Precambrian, Cambro-Silurian and Permian rocks.
Composition in weight per cent:
C 95-80, O 6-2, H 3-1, N 0.7-0.2. S 0.4 and ashes 4-0.1 (Dons 1956).
The name is used since Schumacher (1801) as a designation for an "anthracite"-like mineraloid of hydrothermal origin that occurs in the Kongsberg Silver Mines in Norway, and closeby, near and inside the Oslo Region (a graben area) in Precambrian, Cambro-Silurian and Permian rocks.
Composition in weight per cent:
C 95-80, O 6-2, H 3-1, N 0.7-0.2. S 0.4 and ashes 4-0.1 (Dons 1956).
Unique Identifiers
Mindat ID:
44045
Long-form identifier:
mindat:1:1:44045:3
Physical Properties of Coal blend
Vitreous
Colour:
Jet-black
Streak:
Black
Hardness:
2 - 3 on Mohs scale
Comment:
Fracture surfaces give the idea of ~5
Tenacity:
Brittle
Fracture:
Conchoidal
Crystallography of Coal blend
Crystal System:
Amorphous
Other Language Names for Coal blend
Norwegian:Bergbeg
Kullblende
Kullblende
Common Associates
Associations Based on Photo Data:
| 3 photos of Coal blend associated with Calcite | CaCO3 |
| 2 photos of Coal blend associated with Quartz | SiO2 |
| 1 photo of Coal blend associated with Native Silver | Ag |
| 1 photo of Coal blend associated with Native Copper | Cu |
| 1 photo of Coal blend associated with Pyrrhotite | Fe1-xS |
| 1 photo of Coal blend associated with Laumontite | CaAl2Si4O12 · 4H2O |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Coal blend
mindat.org URL:
https://www.mindat.org/min-44045.html
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References for Coal blend
Reference List:
Schumacher, Christian Friedrich (1801) Versuch eines Verzeichnisses der in den Dänisch- Nordischen Staaten sich findenden einfachen Mineralien mit Tabellen der einfachen Fossilien nach ihren vorwaltenden Bestandtheilen. F. Brummer.
Dons, Johannes A. (1956) Coal blend and uraniferous hydrocarbon in Norway. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 36 (3-4). 249-266
Localities for Coal blend
Showing 38 localities.
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The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Gottes Hülfe in der Noth Mine, Overberget Mining Field, Kongsberg, Buskerud, Norway