I have ceramic knives. Can I use any of your diamond stones to sharpen them?

The only abrasive strong enough to sharpen ceramic is diamond. Any of our diamond stones can sharpen ceramic knives, but since ceramic is an aggressive abrasive as well, it will reduce the life of your diamond stone. DMT’s Hardcoat™ sharpening surface is designed to withstand the rigors of ceramic sharpening as well as sharpen any knives and other edges you may have.  

Find available HC™ products here:  https://www.dmtsharp.com/sharpeners/specialty/hardcoat-surface-sharpeners/