Definition of ransomite in English:
ransomite
noun ˈrans(ə)mʌɪtˈransəmʌɪt
Mineralogy A rare mineral formed by the burning of copper pyrites in a mine and occurring as blue transparent crusts and radiating tufts of acicular crystals.
Origin
1920s. From the name of Frederick Leslie Ransome, U.S. mining geologist + -ite.