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Mineral Specimen #5310    Quartz and Bitumen on Fluorite

Hardin Co., Illinois

Ex. A. Neely, 1960s

The Quartz crystals on this specimen are unusually large for a specimen with associated Fluorite from Hardin Co.., Illinois. The Quartz crystals are stout, have a glassy luster and a smoky color. After close examination, it appears some of this coloration is due to bitumen but it is not clear if the crystals have an inherent smoky color (which did occur at the Hill Leadford mine on rare occasion). The Fluorite is coated with a thin layer of bitumen, sometimes referred to as Asphaltite. The color of the Fluorite appears very dark due to the bitumen but is actually light purple to white in color.

Condition: Very Good

Flaws: Nothing Appreciable

4.4 x 3.4 x 1.8 cm

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This mineral is also found in the following galleries: Minerals From the United States | Quartz | Fluorite | Borates and Hydrocarbons | Minerals Priced Between 25 and 49 Dollars
This mineral is also found in the following galleries: Minerals From the United States | Quartz | Fluorite | Borates and Hydrocarbons | Minerals Priced Between 25 and 49 Dollars