Most indications from those who might know is "lots."
Bob Groves who interviewed Smith in July 1962, a couple months before Smith died, and then was interviewed on tape said, "He was constantly visited by Canadian government officials as well as American government officials who of course were upper echelon people with attaché cases that were chained and locked to make sure none of the information would drop of be left behind in a bus station or something. He had a number of these visits. They had samples they wanted him to analyze - hardware and metal that had been found."
Groves continued, "According to Smith let me cite this, ‘In 1952 we had a noteworthy or a notorious sight over Washington DC. During this time an Air Force jet shot a piece right off a UFO. It was found two hours later. It had a glow to it - a white glow to it - after two weeks it had diminished to a brown texture. The part that was shot off was about as big as could be held in a couple of hands. It had a very distinct edge. It was curved. It had tapering sides so that it appeared that it had been shot off the edge of a double saucer shape. The typical shape.’"
Groves again. " According to Smith the united states military intelligence has tons of hardware. They readily admitted this to Smith upon interview by Smith when he was the director of the research project (Project magnet 1950-1954). Smith also stated they had much film."
One portion of aluminum as hard as quartz. It could only be broken for analysis by grinding. Yet composition seemed similar to standard kitchen pots
There is some confusion at this point whether or not there was one or two pieces involved. One piece we know for sure was recovered by Commander Alvin Moore an intelligence officer with the CIA. It was transported back to Wilbert Smith along with a sample of angel hair.
Vice-Admiral Knowles described the piece Smith showed him as,
To the best of my recollection the object was shot down by a plane and was seen to fall in the yard of a farmer across the river in Virginia. Upon searching the area several pieces were found, one of which was turned over to Mr. Smith for independent research. On one of his trips down to see me he brought the piece along for inspection.
It was a chunk of amorphous metal-like structure brownish in color were broken, with a curved edge indicating the whole thing to have been not over 2' in diameter. The edge was rounded in cross section, perhaps a quarter inch think and obviously swelled to a considerably greater thickness at the center. The outer surface was smooth but not polished, and at the broken sections there were obviously iron particles and even some evidence of iron rust. I would say that the weigh was somewhat lighter that if of solid iron, but it was not ‘extremely light.’
Mr. Smith told me that a chemical test had been made of the piece at hand, that iron had been found in it but little if anything else could be identified.
St. Lawrence Slabs
Nothing really resolved except that the stuff was pretty strange. Found way up on the rocky shore of the river. (3000lbs) and (800lbs)
1960. Was about 3,000 lbs. It suddenly appeared on the shore of the St. Laurence river. Composed of high strength manganese steel, fabricated in layers of .01 to point .8 inches think and according to Smith, " it looked like the whole had been subject to impact as it fell on a hard surface with very high velocity. The flat, (presumably the top) surface was embedded with myriads of particles tentatively identified as micrometeorites. Analysis showed it to contain known elements but such as we do not normally use in steels.
Analyzed for at least 10 years after Smith died by the Ottawa Flying Saucer Club.
1) At one time was subjected to a great deal of heat
2) it under went severe impact 3) the metal had a low magnetic nature 4) no traces of Aluminum, calcium and copper usually found in manganese.
According to a letter written by Wilbert:
Art Bridge took it and has been working on it for the past two weeks. His first try was like mine, to cut off a piece on the power saw. All that happened was a shower of sparks and saw teeth! He eventually had to use a tungsten wire saw and abrade off some samples. He got a Friend in Mines and Technical Surveys to make a spectroscopic analysis of the sample and got the verdict that it was Magnesium Ferrite. Now this material is a purely artificial product made with some considerable effort, and does NOT occur free in nature to the best of your knowledge, nor is it a "byproduct." The only use for it that I can find is in missile nose cones and rocket motor linings, as it is reasonably resistant to ablation.
A close inspection of the surface shows the inclusion of large numbers of very small particles, most of which seem to be light metal silicates. The density of these particles ( on the outer surface only) is about 30 per square centimeter. Dr. Peter Millman advises that micrometeorites of this size would occur through a sq. cm. Section at about 10'6 second so it would take about a year to accumulate such a density.
In 1987 after the MJ-12 documents broke, I sent a copy of the documents to Smith’s metals man. I also sent a copy of some of the Sarbacher material such as the interview that had been done with Smith, and the letter to Bill Steinman.
Even thought this man trusted no one, and hated using a phone, he phoned me. Usually the rule was he would simply phone and tell me to come out. Almost the first comment he made was in reference to the material I had sent related to the Roswell metal. "I’ll tell you flat out Grant. I analyzed a piece that was ‘pulled off’ that new Mexico thing. I know that thing was analyzed. It was a super light material."