'You can't put a price on this German's scale for classifying the relative hardness of minerals--but we can!'
(Friedrich) Mohs
WE HAWK OLD INVENTIONS: You cant put a price on this Germans scale for classifying the relative hardness of minerals--but we can!
You can't put a price on this German's scale for classifying the relative hardness of minerals--but we can!
You can't put a price on this German's scale for classifying the relative hardness of minerals--but we can!
WE HAWK OLD INVENTIONS
Friedrich Mohs
WE HAWK OLD INVENTIONS