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3D3DCrude Oil.
Very hard to get considering how much of the stuff trades hands every day. Just try to buy less than a shipload of it. This is semi-sweet crude from the Frontier Formation in Riverton, Wyoming, and dates to the late Cretaceous, about 65 million years ago. The "sweetness" of crude refers to its sulfur content: The "light sweet crude" you hear about on the news whenever its price is particularly extreme is low-sulfur, low-viscosity crude considered particularly disarable for refining into gasoline.
It actually does taste sweet, I'm told by people who probably haven't tasted it either.
Source: eBay seller quartzpegmatite
Contributor: Theodore Gray
Acquired: 11 March, 2009
Text Updated: 13 March, 2009
Price: Donated
Size: 1"
Composition: CH2