III.silicate mineral contain iron, include olive stone, black column stone, common picrite etc.

三、含铁硅酸盐矿物:有橄榄、黑榴、十字、黑柱、普通。

X-ray images were formed and shown in colors or in 3 dimensions, and have no distortion at low magnification.Hidden zonate phenomena of a picrite were found.

用伪彩、三维视插放大方式显示像，解决了低倍X射线像失真问题，观察到了的隐环带现象。