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Single-crystal button, melted.
An example of the element Tungsten

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Tungsten Single-crystal button, melted
Single-crystal button, melted.
This button started out as a single crystal of tungsten (see previous sample) and was then melted on both sides to make it round and shiny. Because the core was never melted, the molten sections almost certainly recrystallized in alignment with the core, meaning that this button is still a single near-perfect crystal of tungsten. See the samples above for more examples of tungsten buttons and information about the company that produces them, or click the Source link below to find out how to get one yourself. I wrote a story about the visit where I received this object.
Source: Kaistar R&D
Contributor: Kaistar R&D
Acquired: 6 August, 2004
Price: Donated
Size: 0.4"
Purity: 99.999%
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