Altogether ten tons of this iron have been collected, and
specimens of Canyon Diablo Meteorite are in most collectors'
cabinets.
[4] Diamonds. Wm. Crookes, F.R.S. Smithsonian Report. 1897.
"An ardent mineralogist, the late Dr. Foote, in cutting a section
of this meteorite, found the tools were injured by something
vastly harder than metallic iron, and an emery wheel used in
grinding the iron had been ruined. He examined the specimen
chemically, and soon after announced to the scientific world that
the Canyon Diablo Meteorite contained black and transparent
diamonds. This startling discovery was afterwards verified by
Professors Friedel and Moissan, who found that the Canyon Diablo
Meteorite contained the three varieties of carbon--diamond
(transparent and black), graphite and amorphous carbon. Since
this revelation the search for diamonds in meteorites has
occupied the attention of chemists all over the world.
"Here, then, we have absolute proof of the truth of the meteoric
theory. Under atmospheric influences the iron would rapidly
oxidize and rust away, coloring the adjacent soil with red oxide
of iron. The meteoric diamonds would be unaffected and left on
the surface to be found by explorers when oxidation had removed
the last proof of their celestial origin. That there are still
lumps of iron left in Arizona is merely due to the extreme
dryness of the climate and the comparatively short time that the
iron has been on our planet.
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