File:Agate-filled_geode_(Brazil)_2_(32714553426).jpg
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Summary
DescriptionAgate-filled geode (Brazil) 2 (32714553426).jpg |
Agate from Brazil. (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). The whitish, glassy material at the center of this specimen is macrocrystalline quartz. |
Date | |
Source | Agate-filled geode (Brazil) 2 |
Author | James St. John |
Licensing
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/32714553426 (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
Items portrayed in this file
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30 January 2011
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664,299 byte
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1,552 pixel
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 07:12, 10 October 2019 | 1,552 × 1,432 (649 KB) | Ser Amantio di Nicolao | Transferred from Flickr via #flickr2commons |
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Exposure time | 1/60 sec (0.016666666666667) |
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Date and time of data generation | 02:30, 30 January 2011 |
Lens focal length | 9.817 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 21:33, 30 October 2014 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 02:30, 30 January 2011 |
Meaning of each component |
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Image compression mode | 3 |
Shutter speed | 5.90625 |
APEX aperture | 3.625 |
Exposure bias | 0 |
Maximum land aperture | 3.625 APEX (f/3.51) |
Metering mode | Pattern |
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Focal plane resolution unit | inches |
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File source | Digital still camera |
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Scene capture type | Standard |
Supported Flashpix version | 1 |
Image width | 1,552 px |
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Date metadata was last modified | 17:33, 30 October 2014 |