Chalcedony (Var: Myrickite)

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Locality: Knoxville, Knoxville District, Napa Co., California, USA

Colorful Myrickite specimen from the north end of the Napa Knoxville Recreation Area. I actually dug this out of the road.
The specimen was taken out in four large pieces.
Here are the two bookend pieces. The larger one is approximately 6"x5"x5".
The smaller one is approximately 4"x3"x3".

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Photo added: 6th Jun 2008

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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.
Current server date and time: 15th Feb 2012 21:06:48