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![Corundum - Wikipedia, the free encyclopedia]()
en.wikipedia.orgTransparent specimens are used as gems, called ruby if red and ... The name " corundum" is derived from Tamil word Kuruvindam or Sanskrit word Kuruvinda ...瀏覽：325 -
![Corundum: The mineral Corundum, Sapphire, Ruby info & pictures]()
www.minerals.netCorundum is best known for its gem varieties, Ruby and Sapphire. Ruby and Sapphire are scientifically the same mineral but just different colors. Ruby is the red ...瀏覽：752
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日期：2024-08-09
Transparent specimens are used as gems, called ruby if red and ... The name "
corundum" is derived from Tamil word Kuruvindam or Sanskrit word Kuruvinda ......
瀏覽：316
日期：2024-08-08
Corundum is best known for its gem varieties, Ruby and Sapphire. Ruby and
Sapphire are scientifically the same mineral but just different colors. Ruby is the
red ......
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