18 inches below the ground, in three of the pictograms design symbols (identified by their accompanying arcs) three large metal plates of extremely pure Gold (a sign of the Golden Dragon I suspect), Silver, and Bronze (another sacred triad), were unearthed, each containing the complete pictogram design in relief (the opposite to the embossed field design, Ref. 17).

Hesemann writes about the finding, and the later analysis. What were found were three plates: a bronze, silver and one gold plate, the bronze and silver now in the hands of an industrialist. They were shown at his internationally UFO conference, "Dialogue with the Universe", in Dusseldorf, Germany in October, 1992 and used again when he filmed a piece on the Grasdorf case for the US-TV programme, "Encounters" in April, 1994. In addition, the Tugingen lawyer, Dr Roemer-Blum, arranged a scientific evaluation at the German Federal Institute for Material Research (Bundesanstalt fur Materialpufung) in Berlin. Their conclusion, after carefully analyzing both plates was:

"Plate one (silver color) consisted mainly of quite pure silver (what an understatement!), with an additional ingredient accounting for less than 0.1%. The weight of the plate was 4.98kg (11lbs). Plate two (bronze color) consisted of a copper-tin alloy (of which the tin content amounted to 10%-15%), nickel and traces of iron amounting to less than 0.

This meant that the silver plate consisted of 99.9% pure silver, purer than sterling-silver. Furthermore, a spectrographic analysis of both plates proved that they had not been made from a cast but from some kind of conglomerate of silver nuggets and natural copper and tin pieces of the type found in Germany’s Harz forest, not far from Grasdorf. They had been produced, either by heating up to a degree that partially melted the metals - or in a low-gravity environment.

Originally posted by mikesingh

What were the results of the detailed scientific analysis conducted on these plates if any?

Plate one (silver color) consisted mainly of quite pure silver (what an understatement!), with an additional ingredient accounting for less than 0.1%. The weight of the plate was 4.98kg (11lbs). Plate two (bronze color) consisted of a copper-tin alloy (of which the tin content amounted to 10%-15%), nickel and traces of iron amounting to less than 0.

This meant that the silver plate consisted of 99.9% pure silver, purer than sterling-silver. Furthermore, a spectrographic analysis of both plates proved that they had not been made from a cast but from some kind of conglomerate of silver nuggets and natural copper and tin pieces of the type found in Germany’s Harz forest, not far from Grasdorf. They had been produced, either by heating up to a degree that partially melted the metals - or in a low-gravity environment.

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Is it easy to make something made from 99% silver? Let alone find the material in the first place.
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[edit on 14-1-2009 by george_gaz]

The metal can also be produced during the electrolytic refining of copper and by the application of the Parkes process on lead metal obtained from lead ores that contain small amounts of silver. Commercial-grade fine silver is at least 99.9% pure silver, and purities greater than 99.999% are available. In 2007, Peru was the world's top producer of silver, closely followed by Mexico, according to the British Geological Survey.

The gold one was what is known as "altgold," which is also of highest purity. A Mr. Pfeiffer was later able to track down the finder of the plates, and purchased the silver and bronze ones for 50,000 Deutschmarks (about $30,000). Unfortunately, the gold plate had been melted down and was sold for a few hundred thousand Deutschmarks to a jeweler. Yet, the high purity of the two remaining plates was verified by the German Federal Material Inspection Authority, which for all practical purposes, ruled out the possibility of a hoax. What an expensive hoax that would be.