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Types of crystals that a lab tech might see in your urine include:

  • Ammonium biurate.
  • Bilirubin.
  • Calcium oxalate or calcium phosphate.
  • Cystine.
  • Hippuric acid.
  • Leucine.
  • Struvite (magnesium ammonium phosphate).
  • Tyrosine.
  • Uric acid.
  • Xanthine.

The laboratory test can identify the type of crystals by the shape of the crystals under a microscope. Some of the crystals may have no identifiable shape (amorphous).

The pH (acidity) of your urine can contribute to the type of crystals that happen.

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