Board Thread:General Discussion/@comment-9051002-20170820023748/@comment-48285-20190615231920

Actionmanrandell wrote:if its a conjured ability than any nen user would known that its made Nen. every instance of someone touching a conjured item they know its Nen

Kurapika touched the Scarlet Eyes he bought at the Underground Auction, which were conjured by Kortopi and he didn't go "This was conjured by a Nen user" as soon as he touched them. So, no. It's as Gorgo said, it's indestinguishable.