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About ImpsoniteHide

A variety of Pyrobitumen

Impsonite is a black, carbonaceous substance, with a specific gravity of 1.10–1.25 and a carbon content of 50–85%. It is described as an asphaltic pyrobitumen, derived from a fluid bitumen which polymerized after filling a vein. The term was coined by George Homans Eldridge in 1901, referring to the asphaltic material in the Impson Valley in southeastern Oklahoma, later known as the Jumbo mine. The asphaltic material in the Impson Valley was later reclassified as grahamite, based on solubility and chemical similarities with the type grahamite of West Virginia.

Other Language Names for ImpsoniteHide


Varieties of ImpsoniteHide

ArkositeAn organic compound, said to be a variety of Impsonite

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for ImpsoniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Eldridge, G. H. (1901) The asphalt and bituminous rock deposits of the United States: Part 1-Director's report and a paper on asphalt and bituminous rock deposits. Twenty-second annual report of the United States Geological Survey to the Secretary of the Interior, 1900-01: no. 22; pt. 1-01-14, pp. 209-364. United States Geological Survey
Richardson, C., 1910 GRAHAMITE, A SOLID NATIVE BITUMEN. J. Am. Chem. Soc., 1910, 32 (9), pp 1032–1049

Internet Links for ImpsoniteHide

Localities for ImpsoniteHide

ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Tyrol
    • North Tyrol
      • Inn valley
        • Brixlegg - Schwaz area
          • Brixlegg - Rattenberg
            • Geyer - Silberberg District
              • Silberberg
                • West slope ("Am Geyer")
Der Aufschluß (2006)
  • Lower Saxony
    • Harz
      • Lerbach
Andreas Gerstenberg
  • Schleswig-Holstein
    • Elmshorn
      • Lieth
Urbigkeit, k. (1987): Die Mineralien der Kalkgrube Lieth bei Elmshorn. LAPIS 12 (2), 25-29
  • Oklahoma
Jay Ellis Ransom,1974,Gems and Minerals of America
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