I think you mean the horn of rhinoceros. It is made outkeratin, calcium, and melanin. You can compare it with the materials where hair and nails are made off. If you look closely to the horn you can see it is actually hair sticked together. There is no bone in it or marrow.
http://news.mongabay.com/2006/1106-Ohio.html
A rhinoceros' horn is made of hair
A rhinoceros' horn is made of hair
No a rhinoceros horn is made up of keratin which is what make hair and fingernails
Keratin .
Keratin .
Keratin .
Rhinoceros hair is made of the same material as human hair is, keratin. Keratin also makes up the rhino's horn.
Most sources claim that the African rhinoceros has 194 bones. The horn on the head is not made of bone. It is made of the same material as fingernails.
Its horn is made up of a material called Keratin, our nails are also made up of this substance only.
A rhinoceros' tusks are made of keratin, which is the same material that makes up human hair and nails. They are not made of ivory, which is found in the tusks of elephants and other animals.
Because God made it have horns...
Its like your fingernails and hair...Its made of Keratin