Crosswordiee.com

% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Inventor of a mineral hardness scale:

MOHS: Mineral hardness scale inventor Friedrich
MOHS: Mineral hardness scale inventor
MOHS: Minerals' hardness-scale inventor
MOHS: Inventor of a mineral hardness scale