Aluminum Etched block
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3D3DEtched block.
This is an interestingly etched block of high-purity aluminum, showing the crystal zones. I used it as the main feature in an article I wrote for my Popular Science column.
Source: Ethan Currens
Contributor: Ethan Currens
Acquired: 14 October, 2008
Text Updated: 14 October, 2008
Price: Donated
Size: 1"
Purity: 99.99%