Etched zinc ball. | |||
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Etched zinc ball. I made this for a Popular Science column I wrote about etching metals to reveal their interior crystal structure. It didn't turn out very good. Source: Theodore Gray Contributor: Theodore Gray Acquired: 26 October, 2008 Text Updated: 26 October, 2008 Price: $1 Size: 2" Purity: 99.9% | |||
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