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  • | mohs = 7–lower in impure varieties | gravity = 2.65 constant; variable in impure varieties
    15 KB (2,130 words) - 08:46, 20 August 2012
  • ...artz-based component in a crystal oscillator|Crystal oscillator|other uses|Quartz (disambiguation)}} | name = '''Quartz'''
    23 KB (3,123 words) - 08:55, 20 August 2012