How to identify patio flags

[ray99]

Hi. I have just repointed my patio and now want to seal it with a 2 pack resin but as there are different types depending on the flags how can I identify if I have sandstone or concrete etc. Thanks.

 

[r896neo]

if you post a photo i can tell you. a few close ups.

The edges are the best was to get a definitive answer. A sandstone riven flag has fettled/split edges which are obviously natural as opposed to a concrete flag which will be more obviously man made

 

[ray99]

That's great thanks. I left my camera as my grandaughters at the weekend so weather permitting will take some pictures tomorrow.