When he reaches for it, his hand glances off... nothing. A disconnect in the world, like what's beyond that point is totally separate and unreachable. He gets the sense that it's less a barrier and more that the gem is just... not quite in the same place as him.

However, reaching for it also transports him immediately elsewhere before he can contemplate that too deeply!

Jarlaxle lands on a grassy underneath a tall tree. The sound of the sea can be heard lapping in the distance. Laios is lounging under the tree... but a different Laios than he's ever seen before, with hooves and a tail, feathers around his neck and shoulders, and strangely formed arms, one resembling a bird talon and the other a tiger's paw. He looks up, perks up, and waves.