TIL that the mineral dolomite is not named after the Dolomite mountains in Italy, but the other way round, the mineral being named after the geologist who discovered it (https://en.wikipedia.org/wiki/D%C3%A9odat_Gratet_de_Dolomieu). Which of course begs the question of how the mountains were called before dolomite was discovered, apparently "pale mountains" ("monti pallidi").