Probably mostly calcium oxalate.
Characterizations of urinary sediments precipitated after freezing and their effects on urinary protein and chemical analyses.
They mention protein, but there should not normally be any in your urine (it is indicative of kidney problems).
I've handled many urine samples and it is common to observe a precipitate in samples that were stored frozen, even in urine from healthy people.
Are you asking because you are worried about your health? Then please go a see a doctor rather than consult random people on the internet.
[Edited on 15-7-2015 by phlogiston] |