Animal Horns:
* Keratin: This is a tough protein that makes up the horns of animals like cows, goats, sheep, and antelope. It's the same material that makes up human hair and nails.
Musical Instruments:
* Brass: Most modern horns (like trumpets, French horns, and tubas) are made of brass, an alloy of copper and zinc.
* Silver: Some horns are made from silver, which gives them a brighter sound and a more resonant tone.
* Gold: High-end horns may be made from gold, which is even more resonant than silver.
* Wood: Historically, some horns were made from wood, particularly the woodwind instruments like the oboe and clarinet.
Other Horns:
* Plastic: Many modern horns, like those found on cars, are made from plastic for durability and affordability.
* Metal: Some horns, like those used in signaling, may be made of other metals like steel or aluminum.
To be more specific, tell me what kind of horn you're interested in, and I can give you more information about its material!