Slate, looks like schwedenstein but they are softer
https://sharprazorpalace.com/hones/1...ein-hones.html
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Slate, looks like schwedenstein but they are softer
https://sharprazorpalace.com/hones/1...ein-hones.html
I personally rule out a Schwedenstein...the patterns do look to different and there is not enough variation in color....
My guess is that it could be a „Genuine Blue Sharpening Stone“ from UK. They appear from time to time, often in smal wooden boxes. One example appeared as a bench Stone without box and label. The material looks blueish/gray with some nice looking patterns. Also there is a kind of a metallic look comparable to the french Special / La Lune Stones.
Here are some pics of the stones i own:
https://live.staticflickr.com/1471/2...04c764_k_d.jpg
https://live.staticflickr.com/1703/2...1b37c6_k_d.jpg
https://live.staticflickr.com/3753/1...f612dd_k_d.jpg