Chert Samples, Michigan

This is a few small examples of the rock known as chert. It is a sedimentary rock, and sometimes contains small fossils, as shown in the sample on the left.

Photo by Lucy Gridley

The description states:

CHERT

Banded and mottled Chert (embedded fossils). Usually occur with limestone or dolomites, and found throughout Michigan in glacial drift. Chemically the same as Japer and Flint. Can be tumbled or cut for lapidary work.

–As it has properties similar to flint, it was also used in making bladed implements and weapons. The card is dated 1962.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.