Rules of Animal Skins
PARTS OF ANIMALS
SKINS
(1) The skins of all animals, excepting pigs and human beings, are Taahir after having been properly dried in the sun or treated in some other way to thoroughly expel all moisture.
(2) Untreated skins of all dead animals are impure.
(3) Skins of all animals — whether halaal animals (sheep, goats, etc.) or haraam animals (dogs, lions, tigers, etc.) are Taahir if Zabah is effected. (Zabah is the Islamic manner of slaughtering). Skins of Islamically slaughtered animals are Taahir even before having been treated.
N.B.: Zabah will render the skins of haraam animals (besides pigs and human beings) Taahir, but the flesh of such animals does not become halaal for consumption nor does the flesh of haraam animals become Taahir by means of Zabah.
(4) All skins classified as Taahir could be used for any purpose.
STOMACH AND INTESTINES
The stomach and intestina of animals fall in the same category as skins, i.e. like skins are purified by means of drying in the sun and treatment, so, too, do stomach and 'intestines become purified.
BONE, TEETH AND HAIR
(1) The bone, teeth and hair of all animals, besides pigs, are Taahir. These things remain Taahir even if the animals are dead.
(2) Although human hair, bone, teeth and nails are Taahir, it is haraam to utilise them for any purpose. After separating these from the body, they should be buried.
FAT
Animal fat is like the flesh of the animals. The fat of all haraam animals is likewise haraam. The fat of all carrion (animals which have died without Islamic Zabah) is also haraam.