Thanks Swift, yes I do mean Chromium, the Cr 53/54 ratio specifically. Sorry for not being very clear. I read that it had been anaysed by two labs (for various elements isotope ratio's) firstly by La Jolla in California whose results for Cr were inconclusive due to lack of sample size and who do not want to do further tests (they kindly did if for free). Secondly by NASA JPL in Pasadena who said they would not do the Cr test unless they knew where it came from. Nasa JSC in Houston said they were interested in doing the Cr test but needed authorisation - as far as I am aware this was not forthcoming. La Jolla said they might revisit the Cr isotope issue but nothing came of it, maybe because the Sr 87/86 ratio came out as 0.711933 +/- 0.000026 highly suggestive of earth origin but as I understand it not proving it as other bits of space debris of proven non earth origin have values higher than this. (Others here I am sure will know much much more than I do about the significance of the Sr 87/86 value).

I got this info from various posts, on a number of sites, by Dr Gibbons who ordered the tests and worked with Bob White as Executive Director for the museum of the unexplained in Reeds Spring for two years where the object was displayed. I cannot find the original lab reports but http://www.abovetopsecret.com/forum/thread159762/pg3 sums most of what I have read. Not exactly a High Impact Journal is it but it's to the point.

I agree it would be a waste of time and money testing every bit of unusual looking alloy. If I found a bit at a Motorway service station it would remain there. But if I saw it fall off a UFO which Bob White appears to believe well...