From the case:
Tungsten
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Eighty gram pure tungsten rod with oxidized surface.
- Author: Hi-Res Images of Chemical Elements (http://images-of-elements.com/tungsten.php)
- Original file: https://commons.wikimedia.org/wiki/File:Tungsten_rod_with_oxidized_surface,_80_grams._Original_size_in_cm_-_1.3_x_3.jpg
- Modifications: none
- License: Creative Commons Attribution 3.0 Unported
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