- Small, whitish granules usually seen scattered.
- Soluble in 100g/1 acetic acid

- Less commonly seen.
- Colorless.
- Have needle, spherical or dumbbells shape.
- Have very small crystals.

- Seen in small amount in normal individual urine, and when they are in large amount, may indicate chronic cystitis, or prosthetic hypertrophy.
- Have star or needle shapeseen in cluster.
- Colorless.

- Have bundle of needles or “thorn apple” sphere shape.
- Size is about 20 μm.
- Often found together with phosphates.
- Yellowish or brown refractive color.