Quote Originally Posted by Kees View Post
In post #5 you show a wet picture with what looks like slurry. I don't know how you raised it but Lynn Idwalls are very hard stones that do not produce slurry easily. I guess it would take a DMT to do so. I remember late Henk Bos looking at my stones and identifying one of my antique hones as a Lynn Idwall after he had checked its hardness with his sclerometer. He said that Lynn Idwalls are the hardest natural hones around.
Great info, thanks!
That stone with the slurry raised is not my stone. It looks very similar to mine though when a slurry is raised.
If the darker spots on your hone are notably harder, then I would bet that they're the same type of stone based on look and characteristics.