Corundum_USGOV.jpg (38KB, MIME tüüp: image/jpeg)
image/jpeg
This is a file from the Wikimedia Commons. The description on its description page there is copied below.
Corundum
Source: http://resourcescommittee.house.gov/subcommittees/emr/usgsweb/photogallery/ ; English Wikipedia, original upload 3 August 2004 by Chris 73
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