雪晶是按照两种形状中的一种？？板状和圆柱形形成的。
Snow crystals grow in one of two designs? Platelike and columnar.
透辉石有两个方向的完全解理，通常为孪晶生成，短且成圆柱形，断口参差不平。
Diopside crystals have a perfect cleavage in two directions, are often twinned and are short and columnar, but with an uneven fracture.
晶相组成为圆柱状刚玉、圆粒状锆石和莫来石固溶体。
The crystal phase is composed of the cylinder corundum and the circle solid solution of the zirconia and mullite.
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