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

Emery, em′ėr-i, n. a very hard mineral, a variety of corundum, used as powder for polishing, &c.—v.t. to rub or coat with emery.—ns.

From Chambers's Twentieth Century Dictionary (part 2 of 4: E-M) by Various