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Meaning of 刚玉

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gāng (Trad.: 剛玉)
corundum (mineral)
Example Sentences
1
What size of ruby do you have?
2
This corundum type of gem is formed from a variety of aluminum oxide .
3
This corundum type of gem is formed from a variety of aluminum oxide .
4
True rubies are, in fact, the red variety of a mineral called corundum.
5
In addition, there are some special species, such as abrasives, such as sintered corundum.