Desert goat horns are obtained by killing a goat or billy goat in the Kharidian Desert. When used with a pestle and mortar the horn becomes goat horn dust, which is used as ingredients for combat potions.
The easiest way to obtain desert goat horns is to kill goats just west of the bank in Nardah, where banking is quick. It is recommended to wear full desert clothing and have two or more full waterskins in your inventory as the damage from the desert heat effect can be dangerous. Having high combat skills and a good weapon is recommended to kill goats quickly.
Completing the easy Desert Diary rewards players with noted desert goat horns when killing desert goats.