File:Agate 7 (32755748235).jpg
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Size of this preview: 510 × 600 pixels. Other resolutions: 204 × 240 pixels | 408 × 480 pixels | 653 × 768 pixels | 871 × 1,024 pixels | 1,641 × 1,929 pixels.
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| Description |
(public display, Carnegie Museum of Natural History, Pittsburgh, Pennsylvania, USA) "Agate" is a rockhound/collector term for irregularly- & concentrically-layered masses of microcrystalline quartz. Individual layers consist of translucent or opaque, microcrystalline, fibrous quartz called chalcedony. Impurities in different layers cause variations in color. Many agate masses are simply geodes that have completely filled up with quartz. Common agate colors are clearish-whitish-grayish, brownish-red, and yellowish-brown. Commercial agates that occur in greens and blues and purples are almost always dyed (faked). |
| Date | |
| Source | Agate 7 |
| 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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- to share – to copy, distribute and transmit the work
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/32755748235 (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. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 07:12, 10 October 2019 | | 1,641 × 1,929 (559 KB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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