Datolite

Locality: Isle Royale National Park, Lake Superior, Keweenaw Co., Michigan, USA

8.3 x 6.0 x 3.3 cm. An VERY FINE, large, sliced and polished datolite nodule half from Michigan’s Copper Country. This white beauty is porcelaneous and has an unusual pastel-green core with dentritic, red highlights on the edges (caused by copper , I presume). This showy piece is from Isle Royal in Lake Superior, where not too many datolite nodules have been recovered. Ex. Seaman Museum Collection.

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Photo added: 3rd Sep 2007

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Copyright © Jolyon Ralph and Ida Chau 1993-2012. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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