last edited: 5/24/13 number of photos: 10
Chert is a chemical sedimentary rock made of
cryptocrystalline (very fine-grained) quartz, SiO2.
It has a surface that is duller than flint, with
which it is closely related.
chert, brown: A
chert, fossiliferous: A B
chert, grayish brown: A
chert, varigated: A
chert nodules in limestone:
chert arrowheads: A
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non-commercial educational uses.
Just credit photos to R.Weller/Cochise College.