corundum
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Diamond defines a hardness of 10 and is actually about four times harder than corundum, which is 9.
From Textbooks ● Jan. 1, 2017
The Bronco mane and eyeball were created from orange sapphires while the head features pave-set diamonds and custom-cut corundum blue stone.
From Washington Times ● Jun. 12, 2016
In its pure form, corundum is pretty much clear.
From Scientific American ● Apr. 14, 2012
Diamonds are a 10 and almost four times harder than corundum.
From BusinessWeek ● May 31, 2011
Adaman′tine Spar, a name of the mineral corundum or of a brownish variety of it.
From The New Gresham Encyclopedia. Vol. 1 Part 1 A to Amide by Various
