岩溶铝土矿中微刚玉的发现我国尚无人报道过。作者对晋南岩溶铝土矿采用多种方法鉴定,证实有微刚玉存在。 含微刚玉之铝土矿常因受有机质浸染呈深灰至黑灰色,致密状,很坚硬。多呈豆鲕-碎屑结构。而 The discovery of corundum in karst bauxite has not been reported yet in our country. The author of Jinnan karst bauxite using a variety of methods identified, confirmed the existence of micro-corundum. Bauxite containing micro-corundum is often dark gray to dark gray due to organic contamination, dense, very hard. More beans oolong - debris structure. and