大小很像发育成熟的鳞状上皮，但坚硬的细胞壁、胞核的缺乏提示这应该是植物细胞——花粉。

滑石粉是具有折光性的小颗粒，无细胞结构

 This is one xiaohe took, which I planed to use in an article. Seem there are different oppinions for the nature of the objective. I will not use it as an example.

Thank all of you for your suggestion and evaluation. cz