Yeah, like shards or snowflakes. Not like dust or sand. I mean not like solid objects but rather like some structures. They were at the top, at the middle of vial, everywhere, but mostly at the bottom. After shaking they probably dissolved, hard to say because 'amberness' of vial don't let me take a good look.
I thought about other probability: can it be just salts and minerals from water (it was boiled filtered tap water, not distilled/for injections from drugstore like I usually take. I was a bit impatient, desire for tripping was too spontaneous and strong). I read that it is more or less common thing when ethanol is mixed with, for example, mineral water (=not distilled) it can get cloudy and there can be some suspension which can't be fully dissolved. Or something like that. Can it be my case?
Anyway, since I plan to use DOC only per oral, even if there are some salts I hope there are no reasons to concern about? I just will need to shake vial every time before I measure a dose, right?