Possible Alien Artifact found

Photographs have emerged which apparently show a possible Alien artifact.
The pictures released show strange rocks fused together that
contain symbols and carvings.
What's more extraordinary is that the rocks are engraved with what seems to be a star map,
very similar to the plaque that was designed by Carl Sagan and Frank Drake
and was placed onboard the Pioneer 10 probe, launched in 1972.
The rock also has a magnetic field, which seems to emanate from
it when it is near any electric or electronic apparatus.
Did an Extraterrestrial explorer leave a calling card behind?
Is it man made? Or Is it just a hoax?

The photographs of the artifact you see here belonged to a geologist who had
lived in Kupang and died of illness in 1994. He'd been exploring a cave
at the Devil Hills at night, and came upon a strange pile of rocks,
where he found the stone.
It appeared like two pieces of rock bound together, but its most
curious characteristic were the drawings upon its surface: stars, the Sun,
and arrows pointing to them.
You can also see humanoid figures, which compares the carvings
on the rock to the Pioneer plaques.
These were plaques sent into space aboard Pioneer 10 and Pioneer 11 in 1972
and 1973, respectively, meant to give any intelligent life in the universe
information on the crafts origins.

On the strange stone, the images (if they are similar) appear reversed.
The artifact also had other qualities (translated from original):
"According to Willy [Soeharly] who is now a field investigation team
coordinator BETA-UFO Kupang and surrounding areas, the rock contains a
magnet and is thought to contain radioactive elements."

The stone is now kept by the geologist's family.

In the area of the Devil Hills, there have also been reports of UFOs,
including "three black dots" that had formed a triangle, which some
claimed had been the markings of a UFO landing. These markings eventually
vanished due to erosion.
Neons lights had also been reported descending toward the hills.
Is this a legitimate artifact? It's possible this could actually be a
septarian concretion, a kind of rock formation where cracks or separations
occur and fill in with minerals. The carvings could very well be man-made.

What could these carvings mean?
Why are they there?

Perhaps we will never know.
Or perhaps, in some distant future, we will indeed find out the truth.