A '''coxcomb''' [[Mineral Aggregates|mineral aggregate]] is a [[serrated]] crustlike arrangement of [[Twinned Crystals|twinned crystals]]. [[Marcasite]] is an example of a [[mineral]] exhibiting a coxcomb form. Chesterman, p. 40
=Sources=
*Chesterman, Charles W. ''The Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf: New York (1987)