Anyone can make MDMA and not all MDMA is manufactured in bulk in professional labs. Not purifying/evaporating the MDMA properly after synthesis can leave chemicals in the crystals that can cause it to feel dirty. I'm assuming you live in the US so I don't know what the mandy where you are is like but where here we have white champagne, pink champagne, and then just the dirtier browny-yellow coloured stuff. Most of the MDMA we get here comes over on the boat from Liverpool or is from the dark web. Because of that you could say the area I live has more amateur batches of mandy going around, but if anyone were to be manufacturing their own MDMA on the island me or my mates would probably know about it by now. One week it might be good and another it might be shit, especially with the white champagne I think, which looks how you've described here. I don't find the colour of the crystal represents all too much about the quality of the bag, neither does the crystal size as you just need to crush it up a bit if you want to make it smaller for some reason, although if the crystals are smaller you can add weight to it with things like salt or something to bash it up a bit, but I've had rocks the size of about a gram or more when buying in bulk that (more often with the white stuff) have felt really dirty and had this really awful feeling that I can only describe as synthetic compared to all the better bags I've gotten. It feels really really fucked up. After you start doing it more the fucked up feeling gets much worse and you just feel awful following the peak and like a crackhead for the comedown until you take some kind of antipsychotic or opiate to relax you. I start to cringe just thinking about it because there was a period of about 5 weeks when I was addicted where the MD over was consistently that type of shit, and because I used MDMA every other day at that point or just went on 4 day long binges I know the feeling of the dirty stuff better than the purer stuff now. Every time I do it now I come out of it telling myself I hate it and I'll never do it again but I've accepted now that there will probably never be a period of my life where I don't have the money or contacts for a long enough period of time to ever have the willpower to completely stop craving it and every month or so I end up not being able to cope with it and a lot of times find I'm just not able to help myself from doing it when someone offers or if I know a friend is doing it, so the fact that I still do it is nothing to do with the fact that I actually enjoy it. On occasion though there are still good experiences so it isn't my tolerance or just bad memories doing this for me. Honestly I think when it's better the psychosis is a lot worse but that might just be because I actually hate MDMA and the psychosis is caused by another amphetamine being the bashed into the bag like just normal speed which I still enjoy, although there was a time when I wouldn't be able to do it without going mental every single time which is why I probably think the times I've gone mental on MDMA have been more enjoyable.
What was the comedown like?
The comedowns on the dirty stuff is horrific just because there's always something fucked up about it that you just can't put your finger on. I think it's completely unnatural to feel that way and that it just isn't a feeling that would be caused by anything other than a poison. I feel like a lot of drugs in pharmaceuticals now are better considered poisons, mainly antipsychotics, which of the ones I've tried gives me a feeling that is exactly the same kind of fucked up that MDMA is most of the time only in a less dirty and sedative form. If any of what I was just going on about sounds familiar then you've probably just got some of the MDMA with a more amateur synthesis that has impurities left in. Just because it looked pure doesn't mean it was. Like I said the white/clear stuff in my experience is more likely to be absolute shit and feel that awful type of fucked up. I don't think it's down to impurities by more than something of a few fractions of a percentage depending on the impurity, and I've had experiences where the feeling was a lot stronger than other times but I still managed to feel disgusting, so the fact it that it only took 80mg for your girlfriend to feel it doesn't matter. I think I can tell just from the fact that you described it as a 'different high' that even if you haven't done it enough to realise it would be exactly the feeling I'm trying to communicate to you.