© 2003 by the Center For Social Research, Parkland College
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The texture is medium to fine grained.
Luster tends to be dull to waxy.
Colors range from white to gray to blue. Values tend to be lighter. Fossiliferous voids and fracture planes frequently display coatings of white or orange.
Degonia is decidedly fossiliferous. Sponge spicules and crinoid columnals will be present. Negative cast fossils appearing as small voids are common.
Some voids will be filled with iron oxides and others with calcite crystals.
Degonia Chert is not typically heat treated.
The illustrated specimens were recovered from a bed rock exposure on the southeast slopes of Julien Hill in sec. 18, T. 12 S., R. 7 E., Pope County, Illinois.
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