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
Some of these minerals may very well be our very own corundum, with its trace elements.
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
The corundum stone used by the Hindoos and Chinese is composed of corundum powdered, two parts; lac resin, one part.
From Inventions in the Century by William Henry Doolittle
