共找到 2 筆符合的資料
)中。而在變質區域,則產在酸性岩漿與大理岩(Marble)或白雲岩(Dolomite)的接觸帶上,和方解石、磁鐵礦、綠簾石等礦物共生;也產在片麻岩(Gneiss)、片岩(Schist)和大理岩中,共生礦.....more
in gneiss or schists with high aluminum contents. Good quality gem grade cordierites are produced in S.....more