Making a ceramic sharpening strop from junk

The other day, on a stroll to Fritz' place, I found a piece of Ceramic, maybe from an electrode or a filter.  

Had a piece of roe deer antler lying around not doing anything (also found in the woods, taken with permission from the owner, the hunter and the bureau of forestry commissions.). 

Took out my Victorinox SAK, and hey presto, five minutes later got myself a super high tech Ceramic sharpening strop.  

Message.