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
On the Mohs scale, which measures minerals’ hardness from 1 to 10, corundum ranks at 9.
From BusinessWeek ● May 31, 2011
According to the colour of the corundum the stone is known as sapphire cat’s-eye, ruby cat’s-eye, topaz cat’s-eye, &c.
From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5 "Cat" to "Celt" by Various
