1, calcium oxalate stones account for 80% to 84% of the stones, often yellowish brown or stone copper color, smooth surface (calcium oxalate monohydrate), rough (calcium oxalate dihydrate), male onset is common, most have a family history, clearly visible on x-ray. There are often calcium oxalate crystals in the urine sediment. 2, calcium phosphate stones: accounting for 6% to 9% of the stones, the stones are white, rough surface, often antler-shaped, hard texture. Often formed in alkaline urine. It is common in young and strong males, mostly with family history, and is clearly visible on x-ray. 3, uric acid (urate) stones: 6-10% of the stones, smooth surface, often antler-shaped, yellow or brown, hard texture, blurred on x-ray or can not appear. They are more common in men, especially in gout patients, and usually have a family history. Uric acid crystals are visible within the urine sediment. 4, magnesium ammonium phosphate stones: accounting for 6-9% of the stones, stones yellow or dirty gray, dendritic or antler-shaped, soft texture. To women are more common, more patients with urinary tract infection, not through the x-ray. Urine sediment can be seen in the magnesium ammonium phosphate crystals. 5, cystine stones: less than 2% of stones, yellow or white stones, smooth surface, round, not easy to pass x-ray, often formed in acidic urine. Cystine crystals can be seen in the urine sediment. 6, xanthine stones: these stones are rarely seen, white or yellowish-brown, brittle, cannot pass x-rays, usually formed in acidic urine.