'In 1812 this German scientist devised a scale to measure the hardness of minerals'
Frederich Mohs
GEOLOGY: In 1812 this German scientist devised a scale to measure the hardness of minerals
In 1812 this German scientist devised a scale to measure the hardness of minerals
In 1812 this German scientist devised a scale to measure the hardness of minerals
GEOLOGY
Frederich Mohs
GEOLOGY