William Thomson was an English mineralogist, who used the name Guglielmo Thomson in Italy in later life. He died in Palermo at the age of 46 years.
A Widmanstätten pattern appears when certain types of iron meteorite are etched with nitric acid
Krasnojarsk (meteorite)
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Krasnojarsk was the first pallasite meteorite ever found.
William Thomson (mineralogist)
…Italy in later life. He died in Palermo at the age of 46 years. Thomson at the time was living in Naples. One day he decided to treat a sample of the Krasnojarsk meteorite with nitric acid for the purpose of cleaning it of rust. Shortly after the contact with acid he noticed on the surface of the metal a strange…
Hand-colored drawing
Krasnojarsk meteorite slice at the American Museum of Natural History.