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
From his experiments he believes that yellow corundum, or oriental topaz, may have been formed from blue corundum under the influence of radioactive substances present in the soil in which the sapphire was embedded.
From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" by Various
From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
