I was looking to add a Charnwood to my stone collection and stumbled across a Canadian company producing novaculite hones in Red Deer, AB. I picked this one up this morning as I was very very interested. This one is 6 1/8” x 2 13/16” x 1. They are claiming that it’s around a 16k grit equivalent. I know you can't rate naturals based on a grit size but is seems to me to be in the same league as a good black Arkie or Charnwood at a far more reasonable cost. Once I get to put a razor to this stone I will give a review of my impressions. Does anyone else have used a stone such as this?