zonal pegmatite

• 带状伟晶岩

zonal pegmatite的用法和样例：

例句

1. As with other mines containing pegmatite rocks, Brazilian Alexandrite is found in rugged areas that can be difficult to access.
   如其它含有伟晶岩的矿藏一样，巴西亚历山大石也只能在难以到达的崎岖地区所发现。
2. African Alexandrite is typically located in wet regions near rivers and mined by digging through river beds by hand to unearth the Alexandrite rich pegmatite rock.
   非洲亚历山大石都典型地分布于临河的湿润地区，赤手沿河床挖掘，开采富含亚历山大石的伟晶岩。