Ancient UFO Tech? 'Magic' Rotating Stone (Video)

A video on YouTube shows a "magic" stone, shaped like a knife, rotating on a tabletop with no magnets in sight. Is it proof of ancient alien UFO technology?

The strange video has no commentary, other than the user pointing out the stone is not influenced by magnets, and the keywords hint at what the YouTuber proposes is technology well beyond anything known to have been made by humans.

The stone is spun on a wooden floor at first, but some force is acting upon it which makes it spin in the opposite direction, as though it were being pulled by a magnet.

When the stone is placed on a glass table, which doesn't show any magnets on the other side, the video gets really weird. The stone behaves in exactly the same way by overcoming centrifugal force and spinning in the opposite direction, something impossible without an outside influence acting upon it.

The stone seems to have a finger grip carved into its "handle" but the blade edge is blunt and rounded, making it virtually useless as a knife. What is its purpose?

Could this be evidence of ancient alien UFO technology used to propel crafts through the atmosphere and in space?

Whatever it is, it's one of the strangest videos ever posted to the web. If it's a hoax, it's a very good one.

Here's the video: