Mozarkite was adopted as the official state rock for Missouri in 1967. Mozarkite appears in a variety of colors, predominantly red, pink or purple. When the rocks are tumbled and polished, they are sometimes used for ornamental jewelry.

The rock’s name is a combination of Missouri’s state abbreviation “MO,” “Ozark,” and the suffix “ite” meaning “of or pertaining to.” It is a chert (sedimentary rock) found exclusively in Benton County, Missouri, and the surrounding area. The rocks were formed approximately 450 million years ago.


Revised Statutes of Missouri (RSMo)

§10.045. State lithologic emblem. – The rock “Mozarkite” is the official rock and lithologic emblem of Missouri. (L. 1967 p. 93 § 1)

approved 21 July 1967
effective 28 August 1967


Photo Gallery:

Click on an image below to enlarge and read a caption. This will open a new window in the Missouri State Symbols Flickr album.

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Additional Resources:

Hebrank, Arthur W., and Carol S. Radford. “Missouri Mines State Historic Site: Park Hills, Missouri.” Rocks & Minerals 72, no. 6 (November-December 1997): 387-392.

Stuckey, Sarah D., and Juliet E. Morrow. “Sourcing Burlington Formation Chert: Implications for Long Distance Procurement and Exchange.” The Quarry 1, no. 10 (October 2013): 20-29.

Unklesbay, A.G., and Jerry D. Vineyard. Missouri Geology: Three Billion Years of Volcanoes, Seas, Sediments, and Erosion. Columbia, MO: University of Missouri Press, 1992.


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