I can’t say if your stuff is contaminated or not, but I’ve had clean spice many times make me nauseas to the point of puking or at least shouting at my bucket. It’s a side effect I’ve learned to deal with. I try not to indulge until a few hours after eating, and I keep a bucket nearby just in case. Not always an issue, but it happens.
If you are worried though, I would try smashing up your crystal spice a little, and leave in open jar for a while, maybe even in front of a fan. That’s just my advice.
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