Harry dropped the stone out of nerve. But he doesn't go back and get it because it is a very great temptation for him to bring the dead back,or see his dead loved ones. I don't think the stone only brings a fake imprint of a person back. At some part in deathly hallows it was mentioned that using the resurrection stone meant bringing the dead out of peace, witch I think it means that the are bringing back the soul of the dead person with a imprint of their body when they were alive.

Harry dropped the stone out of nerve. But he doesn't go back and get it because it is a very great temptation for him to bring the dead back, or see his dead loved ones. I don't think the stone only brings a fake imprint of a person back. At some part in Deathly Hallows it was mentioned that using the Resurrection Stone meant bringing the dead out of peace, which I think it means that the are bringing back the soul of the dead person with an imprint of their body when they were alive.