My preference is always to get k in a vial and evaporate the liquid myself so I get clean shards and know it’s pure. Recently from a different source I came across four types and cannot figure out what they’re talking about other than maybe it’s any internal way to distinguish the source?

B - British S- Sands NZ - New Zealand A - Amsterdam

All look identical but are supposedly different. Haven’t tried yet so I can’t offer any other thoughts but trying to figure this out before I move forward. Anyone ever seen this or have speculation? Can’t be the source because Sands doesn’t make sense and getting K from New Zealand makes even less sense.