It is either calcification from your prostate or minor Kidney stones.
Hi there,
How are you doing now? Based on your discussion it appears that you possibly have some sort of debris in your urine but it is really difficult to identify what exactly it may be. Often proteins in the urine may appear as whitish debris but not sandy like how you describe.
I suggest that you see a Urologist as early as possible or atleast you physician have your urine sample checked.
If you have any further queries do get in touch with me.
Regards,
Dr Sylvester, MD