pecoraite
/pɪˈkɔːrəʌɪt/Mineralogy
noun
A rare, bright green, monoclinic mineral of the serpentine group, consisting of a basic silicate of nickel, Ni3Si2O5(OH)4, found originally as a product of weathering in an ancient meteorite and subsequently in other metamorphic rocks.
Origin
1960s. From the name of William T. Pecora, U.S. geologist + -ite.