This observation can be collected semi weathered specimens, due to weathering of plagioclase pale, and can be easily distinguished from dark minerals.
这时，可采集半风化的标本观察，由于斜长石风化后颜色变浅，而与暗色矿物易于区别。
The dry land of the continents consists mostly of granite and other light silicate minerals, while the ocean floors are made up mostly of a dark, dense volcanic rock called basalt.
陆地地壳主要由花岗岩和其它轻质硅酸盐矿物构成，而海底则主要由黑色的高密度火山岩——玄武岩构成。
A dark mineral consisting of oxides of yttrium and erbium and tantalum and other minerals.
一种黑色矿物，由钇、铒、钽和其他矿物的氧化物组成。
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