It’s Uric Acid Crystals, Uric acid crystals are diamond or barrel shaped crystals that are typically yellow to orange-brown in color. They can be found in normal urine but may also form when you have kidney stones or gout. Uric acid crystals may also be present during treatment with certain chemotherapy drugs. Uric acid is a byproduct of a protein-rich diet, which can increase uric acid excretion in the urine. Urate crystals are the “salt form” of uric acid crystals and are typically composed of uric acid with calcium or sodium. They can be needle-like in shape and also may be associated with gout.