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Topaz
An example of the element Silicon

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Topaz.
Description from the source:
Topaz (Al2 Si O4 (F OH)2 orth.), Perfect, transparent crystals with a bit of matrix. 2,6x2,1x1,5 cm; 10 g with box.
Source: Simone Citon
Contributor: John Gray
Acquired: 28 January, 2009
Text Updated: 29 January, 2009
Price: Trade
Size: 1"
Composition: Al2SiO4(FOH)2
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