Hey guys, now i suspect that the big rock mephedrone is actually a mixture of cathinones. It does contain mephedrone but, sth else as well. I checked how it dissolve in water and well, some dissolve easily , and some stay floating for a few secs. I admit it is nice stuff, but its not pure mephedrone. Can anyone test with any kit please, or a GCMS report would be awesome ? I tried with a little bit, it gave me nice euphoria, but it was overstimulating. I think its meph+mdpv or apvp or sth stimulant is added as well. Please think about it what you think.