Impsonite

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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.It is believed to be derived from a fluid bitumen which polymerized after filling a vein.^[1]

[edit] External links

• http://www.mindat.org/min-11115.html

[edit] References