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Undo revision 916878 by RonaldR (talk)
A '''columnar''' [[Mineral Aggregates|mineral aggregate]] is made up of slender, [[parallel]] [[column]]s. [[Beryl]] is an example of a [[mineral]] exhibiting a columnar form.
==Sources==
*Chesterman, Charles W. ''The Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf: New York (1987), ''p. 40''
[[Category:Crystallography]]