The exoplanet's atmosphere condenses out minerals such as enstatite, corundum, spinel, and wollastonite.
这颗系外行星的大气冷凝，：火辉石、刚玉、尖晶石和硅灰石。
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Ruby and sapphire, for example, are actually the same mineral, called corundum, with a chemical formula of two aluminums and three oxygens.
例如，石和蓝石实同一种矿物，叫做刚玉，化学为Al2O3。
Raindrops made of corundum, which is the material that rubies and sapphires are made of.
由刚玉制成的雨滴，刚玉石和蓝石的材料。
Rubies are a gem-quality version of a mineral known as corundum.
石刚玉矿物中的一种石级品种。
Sapphire is also a form of corundum.
蓝石也刚玉的一种。
What makes a ruby a ruby instead of normal corundum are impurities in the crystal from the element chromium.
使石成为石而非普通刚玉的原因，在于其晶体中掺杂的铬元素。
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，
：
火辉石、刚玉、尖晶石和硅灰石。
石和蓝
同一种矿物，叫做
为Al2O3。
石和蓝
