Horns are Keratin, the same stuff our nails and hair is made of.
buffalo horn
Yes, water buffalo horns do have the ability to grow back if they are broken or damaged. The horns of water buffalo are made of keratin, which is a protein that makes up hair and nails in animals. When a water buffalo horn is broken or damaged, the keratin-producing cells in the horn's base can regenerate and grow a new horn over time.
The horse for mobility, buffalo for food, shelter, clothing and tools made of bone or horn.
The abalone shell is inlaid over buffalo horn saddle plugs.
of course
The horn tip is in the same place on the buffalo's head on all buffalo nickels, almost directly above its eye, where the horn would protrude from the animal's skull in real life. Unfortunately design problem caused the horn to wear off rather quickly so most circulated buffalo nickels show at most a partial horn. If all of your buffalo nickels are too worn to see the horn easily, you can use any search engine to look for images of unworn coins. E.g. search for "buffalo nickel pictures" or "buffalo nickel images".
The horn is on the Buffalo's head, on the reverse of the coin.
This means the horn must be fully outlined.
Cape Horn Cape Buffalo
A rhinoceros.
Powder Horns are made by cleaning out the inside and sanding down the inside of the horn to make them lighter and translucent (so you can see the amount of powder in it when held up to the light). A hole is drilled from the pointed end into the hollow horn. The large end is plugged and the tip is finished with a removal plug. Buffalo horns are large diameter and heavy. I've seen one that was flattened so it appeared more like a flask. Otherwise, there is no real difference in making a powder horn from a buffalo horn.
The Rhino would win. The Rhino can knock the Buffalo with his horn and Rhino are stronger than Buffalo.