  Quartz.
Description from the source:
Quartz (Si O2 trig.), Magaliesberg Quartz deposits, Mpumalanga, South Africa. Nice cluster of Quartz "Spirit". 3,5x2,7x2,5 cm; 22 g.
Source: Simone Citon
Contributor: John Gray
Acquired: 26 September, 2008
Price: Trade
Size: 0.75"
Composition: SiO2
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