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- *[[List of minerals]] {{Silica minerals}}15 KB (2,130 words) - 09:46, 20 August 2012
- | symmetry = Trigonal [[H–M Symbol]] 32 ..., W. A., R. A. Howie and J. Zussman, ''An Introduction to the Rock Forming Minerals'', Logman, 1966, pp. 340–355 ISBN 0-582-44210-9</ref>23 KB (3,123 words) - 09:55, 20 August 2012
