There are a bunch of gold and assay photos, all enlargeable, on this site.
http://goldvault.com/index.html
Look here at assaying.org. Click on the photos.
http://www.assaying.org/Assay%20Laboratory%20Photos/index.html
Another good one.
http://www.sierra-silver.com/
http://goldvault.com/index.html
Look here at assaying.org. Click on the photos.
http://www.assaying.org/Assay%20Laboratory%20Photos/index.html
Another good one.
http://www.sierra-silver.com/