In 1974, a group of building workers while working on the shores of the Mures River near the town of Aiud in central Romania, discovered three different objects 10 meters (33 feet) deep in a sand trench, of which two were the prehistoric elephant’s fossilized bones but the third object was looking like a wedge of very light man-made metal such as aluminium, which was mysteriously located alongside the two fossilized bones.
The experts were more puzzled when they observed the sharp concavities and the edges of the wedge. The further tests were going to reveal the Aluminum Wedge of Aiud was actually made of 12 different metals and was about 90 percent aluminium. The exact composition of the artifact is 89% aluminum, 6.2% copper, 1.81% zinc, 2.84% silicon, 1.81% zinc, 0.41% lead, 0.11% cadmium, 0.0024% nickel, 0.0023% cobalt, 0,0003% bismuth, 0.0002% silver and gallium in extremely small amounts. It seems as if it was manufactured as the part of a more complex mechanical system.
This mysterious metal object was handed over to the “National Museum of Transylvanian History” in the city of Cluj-Napoca, Romania, where it was left ignored in a storeroom for 20 years until the editors from a Romanian UFO magazine found it in 1995.
Later, the artifact goes on display in the museum with a sign that read ‘origin still unknown‘. After some years, the strange Aluminium Wedge of Aiud was no longer on display for the public and was hidden in an undisclosed location.