This frame clearly shows the hexagonal shape of the cystine crystal. This particular crystal looks as though two large crystals precipitated overlapping each other with several other crystals lying on top of the two. Leucine crystals are spheres with concentric circles or radial striations and appear dark yellow to brown in color. They may be present in severe liver disease and aminoacidurias. They often accompany tyrosine and are confirmed by their solubility in alkali.
Tyrosine appears as fine, delicate needles in clusters or sheaves.
They can appear colorless to yellow. They are found in liver disease and aminoaciduria. Confirm these crystals by dissolving in alkali. Note how fine these crystals appear. While the crystals in this frame are very easy to see, that is not always true.