Sillimanite , mo to stone refractory .

硅线石、莫来石质耐火制品。

Practice 1 thin section and hand specimen , corundum - sillimanite - orthoclase gneiss resembling kash system .

薄片和手标本，刚玉－夕线石－正长石片麻岩，似kash系统。

Developing straegy research industry planning ; project evaluation and project consulting & design in non-metallic minerals such as graphite , kaolin , talc , attapulgite , bentonite , sillimanite gypsum etc.

对石墨、高岭土、云母、滑石凹凸棒土、膨润土、硅成石、石膏等非金属矿发展战略研究，行业规划。