FLL26.htm
...... and gray, right side) with a nearly vertical composition plane has ... ..
http://www.csun.edu/~vcgeo005/FLL26.htm, score=11, date indexed=November 12, 2005, 10:37 am

Mineral Gallery - THE TWINNED MINERALS
...The composition plane is a mirror plane where the two twins can look ... Contact twins have a composition plane (the twin plane) that forms at ... ..
http://www.galleries.com/minerals/property/twins.htm, score=11, date indexed=January 20, 2006, 5:14 pm

Calcite: Calcite mineral data from mindat.org mineralogy database
...... most common being when the twin plane and the composition plane are { ... ..
http://www.mindat.org/min-859.html, score=11, date indexed=December 29, 2005, 6:59 pm

þÿ
...Twinning: Around [31 ], composition plane. g.. hysical. roperties:. ... ..
http://www.minsocam.org/msa/Handbook/Cookeite.PDF, score=11, date indexed=November 16, 2005, 10:40 am

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