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.
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
For example apatite is about three times harder than fluorite and diamond is three times harder than corundum.
From Textbooks ● Jan. 1, 2015
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
Its hardness is generally given as 9, but there are slight variations in different stones, sapphire being rather harder than ruby, and ruby than common corundum.
From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 4 "Coquelin" to "Costume" by Various
