Kidney stones don't all look the same. The color depends on what chemicals are in it. Most are yellow or brown, but they can be tan, gold, or black. Stones can be round, jagged, or even have branches. They vary in size from specks to pebbles to stones as big as golf balls.
Kidney stones can cause kidney damage.
Whether there is damage and, if so, how much there is depends on the location of the stone in the urinary system. To avoid or minimize damage, it is important to eliminate stones that form and to prevent new ones from developing. Therefore, your family doctor may refer you to a urologist , a doctor who specializes in urinary diseases. Anyone can get kidney stones, but some people are more likely to develop stones than others. Typically, a person with a kidney stone is a man 20 to 60 years old.