Can someone help me determine if this SN is quality

[rabbithole]

Without having to do blood or aquarium test? It’s on the big river site, in the us, the only one that has prime shipping available. Initials of product are HM.

I don’t know because everyone seems to use LW. I am planning on going tonight or tomorrow. Planning, no idea if SI will stop me.
I looked up info on this product and it says “assay 98%” is that the same as purity?

 

[StuFin]

I think so.

 

[JustABunchOfAtoms]

Does the seller ship to the UK?

 

[Nymph]

Yeah it means purity

 

[Meditation guide]

I don't know the quality of every bottle of every seller. That's why people test each bottle they get before they use it.
It's important to know what you've got. I'm not sure how to test it. But I wouldn't trust any without testing it first.