Coxcomb
From Conservapedia
A coxcomb mineral aggregate is a serrated crustlike arrangement of 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)