Quote:
Originally Posted by Timsforgiven
Hello, I have had granite cutting boards before and I just recently got a nice large piece that I am currently sealing to use as a trivet/cheese board/cutting board.
I have used granite cutting boards for a long time and never had any problems with my knives getting ruined. How often do you all have to sharpen your knives?
What about using stone ruins a knife? Anyway I was just curious if I should stop using them. Thanks for the help.
 -Tim-
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Think about it - Do they use wood for knife sharpeners? No, they use stone (either artificial or natural). They use stone because it's harder than steel. So why would you use it for a cutting board, where you are just ramming the sharp edge onto a flat stone? Wood (or most plastics) will give when the knife contacts it. When the knife contacts stone, it's the knife which gives way, rapidly dulling the edge.
I'm always a bit surprised when I see this question asked because to me it seems like simple common sense. If you want your knives to stay sharp and live a long, full life, you never cut on a material which is harder than the knife itself. However, I've been unable to teach this principle to my wife in the 20 years we've been married, so sometimes I just have to scratch my head in wonder.