The phrase "although authentic" is correct and usable in written English.
It can be used to introduce a contrast or exception regarding the authenticity of something being discussed.
Example: "The painting was considered valuable, although authentic, it lacked the historical significance that collectors sought."
Alternatives: "even if genuine" or "despite being real".
Importantly, it sounds authentic, although authentic to what?
Although authentic leadership can produce many positive results, the results might be different for different employees.
Although authentic CCA is characterized by its typical sweet and neutral fragrance, its aroma components have been rarely investigated.
Although authentic assessment in vocational education and training might seem appropriate (Rush et al. 2010) trainers need to be aware of the biases in them (Bennett 2011).
Although authentic pré-salé lamb is difficult to find in the U.S., American lamb is starting to appear on more menus.
Although no authentic record is available, coal from the Fushun mine in northeastern China may have been employed to smelt copper as early as 1000 bc.
Although delivering authentic medical innovations today is more complex than ever, minimization of off-target effects should be a priority.
In addition, HsMIF has two physically separated catalytic sites that confer tautomerase as well as oxidoreductase activity, although the authentic in vivo substrates of these enzymatic activities remain unknown [ 34, 64].
Furthermore, to their knowledge, all of the credit card information provided was authentic, although there was one instance in which an employee had a card authenticated by had removed the information once it triggered fraud protection at their bank.
The book itself, with its stamp, was thought to be authentic, although where and how Cosey got his hands on it has never been ascertained.
Chief Moose clearly believed that the Ashland note was authentic, although he would not say whether it contained references to the tarot card message or to some hard evidence that could only have come from the sniper.
