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2. Sharpening stone - Wikipedia

   en.wikipedia.org/wiki/Sharpening_stone

   Over time diamond stones will wear out and need to be replaced. The lifespan can be extended by using light pressure and allowing the stone to work. The highest quality diamond sharpeners use monocrystalline diamonds, single structures which will not break, giving them an excellent lifespan. These diamonds are bonded onto a precision ground ...

3. Knife sharpening - Wikipedia

   en.wikipedia.org/wiki/Knife_sharpening

   Diamond stones can be useful in the sharpening process. Diamond is the hardest naturally occurring substance known and as such can be used to sharpen almost any material. [8] (Coarse diamond sharpening stones can be used for flattening waterstones. [8] [9]) Alternatively, tungsten carbide blades can be used in knife sharpening.

4. Sharpening - Wikipedia

   en.wikipedia.org/wiki/Sharpening

   The substance on the sharpening surface must be harder (hardness is measured on the Mohs scale) than the material being sharpened; diamond is extremely hard, making diamond dust very effective for sharpening, though expensive; less costly, but less hard, abrasives are available, such as synthetic and natural Japanese water-stones. Several ...

5. Tumbler knife sharpener review, after weeks of testing - AOL

   www.aol.com/news/tumbler-knife-sharpener-review...

   Tumbler Knife Sharpener $129.00 at Amazon. Tumbler Knife Sharpener $98.00 at Tumbler. The Tumbler knife sharpener ($129) is a manual knife sharpener with two components: a two-sided rolling disc ...

6. Forget bling, De Beers has found a surprising use for lab ...

   www.aol.com/finance/forget-bling-beers-found...

   De Beers tried its hand at growing a lab-grown diamond jewelry business for six years before ditching it earlier this year. But a segment of that failed attempt has flourished—and it has nothing ...

7. Ceramic knife - Wikipedia

   en.wikipedia.org/wiki/Ceramic_knife

   A diamond dust sharpener with cradle for a ceramic knife. Unlike a steel blade that benefits from regular honing and resharpening in order to keep a sharp edge, a much harder ceramic blade will stay sharp and retain its cutting edge for much longer—at least ten times longer according to tests on a particular knife. [4]