[Yukiharu]

There's quite a few people selling 'seiryu stones' online, but it has been confirmed that most of these are actually Chinese ying stones, a sort of limestone.
Ying stones tend to be a light grey in color, but there are other people now selling a sort of blue rock with white striations.
I was wondering if that was true seiryu, or another fake.

 

[mot]

You are correct about the Ying stone. I have no idea how anyone but the seller would be able to answer this question for you with certainty. If you like the stone go for it.

 

[Mikeygmzmg]

The ones with the bluish color are the real seiryu stones. Much harder to find those!

The ying stones look good too, I wonder if anyone can weigh in on their effects to water parameters as compared to true seiryu.