File:Feldspar(Amazonite)USGOV.jpg
Feldspar(Amazonite)USGOV.jpg (600 × 452 pixels, file size: 32 KB, MIME type: image/jpeg)
Captions
Feldspar (Amazonite)
Source: US Government archive copy at the Wayback Machine
Public domainPublic domainfalsefalse |
This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.
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This image has currency in it to indicate scale.
Using coins for scale is discouraged as it will require people unfamiliar with them to look up the dimensions or guess, both of which defeat the purpose of the object in the first place. Coins can also reinforce a geographical bias, and some coins' designs are copyrighted. Ideally, a photograph should include a ruler with the subject (example) or an added scale marking. SI ("metric") units are the most commonly used worldwide (see meter and centimeter). Images with coins to indicate scaleCommon coin diameters for reference:
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 05:19, 7 January 2005 | 600 × 452 (32 KB) | Jurema Oliveira (talk | contribs) |
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