镁铝榴石形成于滇东南晚第三纪岩简状的玄武质次火山角砾岩中，角砾岩成分复杂，其中包含有镁铝榴石和铬透辉石等可作宝石材料利用的角砾和晶屑。

The rubbles and crpetals of prrope and chrome-diopsidewhich can be used as gem materials are found in the breccias whose component is very complex.

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受砾屑硅质岩、含砾砂屑硅质岩控制。

It Suffer the gravel silica rock, arena silica control.

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南梁岩体主要由斑状花岗岩、流纹斑岩、花斑岩及流纹质角砾熔岩组成。

Nanliang complex is mainly composed of porphyritic granite, granophyre, rhyolite - porphyry and rhyolitic agmatite-lava.

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