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Crater of Diamonds State Park (Arkansas Diamond Corp. Mine; Mauney Mine; Ozark Mine; Prairie Creek Lamproite), Murfreesboro, Pike Co., Arkansas, USA

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Latitude & Longitude (WGS84): 34° 1' 59'' North , 93° 40' 21'' West
Latitude & Longitude (decimal): 34.0333333333, -93.6725

Diamonds were discovered at this location in 1906. Now a fee-based collecting site.

Four major rock types occur: magmatic lamproite (with mantle and crust-derived xenoliths); marr epiclastics (largely sandstone); lamproite lapilli tuff (phlogopite-rich); and lamproite breccia tuff. These last two types are the source of most of the diamonds recovered in the visitor area.

Haggertyite is present as microscopic hexagonal plates in the alteration zones of xenoliths in Prairie Creek lamproite.

The Prairie Creek Lamproite is Early Cretaceous (106 mya) in age.

Mindat Articles

5. Diamonds R Waiting 4U At The Crater of Diamonds State Park by Frank Festa
TGMS 2008 - The Crater of Diamonds by Jolyon & Katya Ralph

Mineral List

Mineral list contains entries from the region specified including sub-localities

26 valid minerals. 1 (TL) - type locality of valid minerals.

Rock Types Recorded

Entries shown in red are rocks recorded for this region.

Note: this is a very new system on and data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

Localities in this Region


The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Gogineni, S.; Melton, C.; and Giardini. A. (1978): Some petrological aspects of the Prairie Creek diamond-bearing kimberlite diatreme, Arkansas, Contributions to Mineralogy and Petrology: 66: 252-262.

Mitchell, Roger H. and Bergman, Steven C. (1991): Petrology of Lamproites, New York, Plenum Press.

Grey, Ian E., Velde, Danielle, Criddle, Alan J. (1998): Haggertyite, a new magnetoplumbite-type titanate mineral from the Prairie Creek (Arkansas) lamproite, American Mineralogist: 83: 1323-1329.

Mitchell, Roger H. and Chakhmouradian (1999):Sr-Bearing Perovskite and Loparite from Lamproite and Agpaitic Nepheline Syenite Pegmatites, Canadian Mineralogist: 37: 99-112.

Velde, Danielle (2000): Mineralogy of mafic xenoliths and their reaction zones in the olivine lamproite from Prairie Creek Arkansas and the paragenesis of haggertyite, Ba [Fe6Ti5Mg]O19, American Mineralogist: 85: 420-429.

Dunn, Dennis Patrick (2002): Xenolith mineralogy and geology of the Prairie Creek lamproite province, Arkansas. PhD dissertation, University of Texas, Austin.

Smith, II, R. C. and Barnes, J. H. (2006), Blue Gray by Day and Pinkish Purple by Night: Pennsylvania's Pyrope Garnets, Pennsylvania Geology: 36(4): 2-10. (Also, the link below with analyses of five G5 and one G9 garnet from Crater of Diamonds, Arkansas.)

Howard, J. M. and Hanson, W. D. (2008): Geology of the Crater of Diamonds State Park and Vicinity, Pike County, Arkansas, Arkansas Geological Survey.

External Links

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