norbergite
/ˈnɔːbəːɡʌɪt/Mineralogy
noun
An orthorhombic basic silicate and fluoride of magnesium, Mg3SiO4(F,OH)2, which is a member of the humite group and occurs as pink or whitish crystals.
Origin
1920s. From Norberg, the name of a village in Sweden near which the mineral was discovered + -ite.