Hi @brack1 I’ve been following your conversation about these odd crystals your wife is dealing with…what a crazy thing to happen. Here’s my two cents worth…

Have these crystals been examined for composition?
If you could gather (scrape and collect) enough of them, it’s possible for a hospital pathology department or local commercial analytical lab to do an elemental analysis such as an infrared scan (FTIR) infrared spectral analysis.

A simple examination under a microscope could be a first place to start to determine the morphology of the crystals which could potentially lead to identification, such as uric acid crystals would be sharp and pointy.
By checking the solubility of the crystals to determine if it’s soluble in acidic, alkaline, polar or non polar solvents can be very telling as to the composition to see if it’s carbon based or mineral.

Once the composition is identified that might help lead to the cause of your wife’s condition.
Has she had blood work done recently to make sure she isn’t dealing with high levels of uric acid, or vitamins, etc?