The Gemara says that only wool and linen can become Tamei with Tzaraas. Doesnt the Pasuk mention leather as well?
dh, lakewood nj
The Gemara does not say that only wool and linen can become impure with Tzara'as, as this would contradict an explicit Pasuk (Vayikra 13:48), as you mentioned. Rather, the Gemara is discussing the definition of the term Beged, and deriving from the Pasuk (Vayikra 13:47) that anytime the word Beged is stated it refers solely to clothing made of wool or linen.
All the best,
Yaakov Montrose