But in general, sapphire only refers to blue corundum. Other color corundum often named by their colors: yellow sapphire, green sapphire etc.
通常蓝宝石泛指蓝色的刚玉，其它颜色的刚玉则通常用其颜色来描述，如黄色蓝宝石、绿色蓝宝石等。
Corundum-mullite Board: it is made by high sintering corundum and mullite together.
刚玉—莫来石棚板：是以电熔刚玉、莫来石复合成型经高温烧结而成。
In the experiment using corundum aggregate, the specimens prepared with high ferric oxide brown corundum aggregate has the highest bulk density and strength.
在使用刚玉骨料的试验中，采用高铁棕刚玉的试样的体积密度和强度均最高。
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