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Quartz.
Description from the source:
Quartz (SiO2 trig.), San Luis Potosi`, Mexico. Perfect biterminated crystal. 3,5x2,5x2,1 cm; 15 g.
Source:
Simone Citon
Contributor:
John Gray
Acquired:
26 September, 2008
Text Updated:
28 September, 2008
Price:
Trade
Size:
1.4"
Composition:
Si
O
2