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A very hard, dense, even-textured, silica-bearing sedimentary rock used in whetstones.

[Latin novācula, razor + -ite.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Geological Science) a fine-grained dense hard rock containing quartz and feldspar: used as a whetstone
[C18: from Latin novācula sharp knife, razor, from novāre to renew]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(noʊˈvæk yəˌlaɪt)

a very hard sedimentary rock, similar to chert, composed essentially of microcrystalline quartz.
[1790–1800; < Latin novācul(a) razor + -ite1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Founded in Hot Springs, Ark., by James Archer Smith, the company began as a mining and sales operation of novaculite, the mineral used in whetstones.
Also of dirt dobbers, nightcrawlers, martin houses, honey, and whetstones from the Novaculite Uplift.
"Silica stone" is an industrial term for materials such as quartzite, novaculite and other microcrystalline quartz rocks.
Founded in 1886 by the current president's great-grandfather, Smith's started as a stone company selling raw Novaculite stone, which is found in commercial deposits within a 15- to 20-mile radius around Hot Springs.
Gesner Id and Number Gesner Location Schorl GN1075 Connick's Mills, Waewig River Novaculite or Hone Campobello Slate GN 1253 Fossil Corallines Digdeguash River GN1363.GN1364 Sulpuret of copper GN1127 Digdeguash Sulphate of barytes GN1072 Chance Harbour Serpentine GN 1093 Musquash Spirifers and other Near Ocnabog Lake shells GN1400 Black oxide of Quaco manganese GN1007 Part of a large Grindstone Island fossil tree GN1551 Bitumea GN Westmorland Coal GN 722?
Don't even bother with an Arkansas stone, DBK steel is harder than Novaculite so you'll only be carving up your whetstone.
The three main types of sharpening stones are novaculite, diamond, and ceramic.
Another knife blade, almost opaque, is made from Novaculite, which is found in the Ouachita National Forest area of Arkansas.
Machines of certain types con be prone to pump dogging after long periods of use, especially those utilising 'Novaculite' wet blast media, leading to prolonged downtime whilst pumps are cleared or changed.