maldonite
/ˈmɔːldənʌɪt/ /ˈmɒldənʌɪt/Mineralogy
noun
A native alloy of gold and bismuth, Au2Bi, crystallizing in the cubic system and usually occurring as silvery-white granular masses.
Origin
Mid 19th century; earliest use found in Quarterly Journal of the Geological Society of London. From the name of Maldon, Victoria, Australia, where the alloy was discovered + -ite.