Poachers kill Indian rhinos for their horns. They have two horns that grow from the front of their heads and are made from a unique material called keratin, the same substance that is found in hair and nails. As a result, poachers can remove one horn without disturbing the other because rhinos typically only need one to survive. The horns are used as decoration or for personal use by high-rolling gamblers during ancient Asian gambling competitions such as those practiced in China's Macau SAR province. This species horn was also seen as an aphrodisiac potion by those participating in these competitions. In Vietnam, it is believed that Indian Rhino animals’ horns can cure cancer, even though there is not a shred of evidence to support this claim. Horns are also used as dagger handles and rhinoceros horns can cost up to $75,000 for a 3-kilogram (6.5 pounds).