File:Laguna Agate (Chihuahua, Mexico) 3 (32785167565).jpg

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Agate ("Laguna Agate") from Mexico. (Denver Museum of Nature & Science, Denver, Colorado, USA)

"Agate" is a rockhound/collector term for cavities in rocks (usually sedimentary rocks such as limestone or igneous rocks such as basalt) that have been partially or completely filled with irregularly concentric layers of microcrystalline, fibrous quartz (chalcedony - SiO2). Agate is quartz.
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Source Laguna Agate (Chihuahua, Mexico) 3
Author James St. John

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/32785167565 (archive). It was reviewed on 10 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

10 October 2019

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Date/TimeThumbnailDimensionsUserComment
current07:13, 10 October 2019Thumbnail for version as of 07:13, 10 October 20192,496 × 1,968 (1.09 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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