Yorkstone Rocks - Safe?

[rickyjones1209]

Hi

Just setting up my new AquaNano 60 as a freshwater aquarium and I'm looking to put Yorkstone rocks in if possible.

I understand sandstone (which I think Yorkstone is) is typically safe for aquariums, and I know I can test with vinegar/acid, but before I make the trip to test and collect does anyone have experience of using this type of rock or know if it's likely to effect PH etc?

Thanks!