Polished microprobe preparate from two nuggets mounted in epoxy wax. Both nuggets composed by mixture of micrograins pure metals - native lead, tin, aluminium, gold and quartz inclusions. The larger nugget is more rich by lead, but the smaller one is tin dominant. I am repeat again, this isn't any alloy, but mixture of pure metal grains.
Note that real colour of metal is some more white. Its greyish tint is caused by my scaner - I was able to scan this specimen only planeparallel to glass, so polished metal is out reflection.
Outer diameter of the preparate is 22 mm. On its side you can see handwritten label "Al(!)". Lets remember, that in those times native aluminium was known only on the Moon. Collected and investigated by Margarita I. Novgorodova in the end of 70th. Pavel M. Kartashov collection and photo.
Note that real colour of metal is some more white. Its greyish tint is caused by my scaner - I was able to scan this specimen only planeparallel to glass, so polished metal is out reflection.
Outer diameter of the preparate is 22 mm. On its side you can see handwritten label "Al(!)". Lets remember, that in those times native aluminium was known only on the Moon. Collected and investigated by Margarita I. Novgorodova in the end of 70th. Pavel M. Kartashov collection and photo.
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