It might be available in the next version.
Faker::Blockchain::Tezos.account #=> "tz1eUsgK6aj752Fbxwk5sAoEFvSDnPjZ4qvk"
Faker::Blockchain::Tezos.contract #=> "KT1MroqeP15nnitB4CnNfkqHYa2NErhPPLWF"
Faker::Blockchain::Tezos.operation #=> "onygWYXJX3xNstFLv9PcCrhQdCkENC795xwSinmTEc1jsDN4VDa"
Faker::Blockchain::Tezos.block #=> "BMbhs2rkY1dvAkAyRytvPsjFQ2RiPrBhYkxvWpY65dzkdSuw58a"
Faker::Blockchain::Tezos.signature #=> "edsigu165B7VFf3Dpw2QABVzEtCxJY2gsNBNcE3Ti7rRxtDUjqTFRpg67EdAQmY6YWPE5tKJDMnSTJDFu65gic8uLjbW2YwGvAZ"