DU Diamand
Topac
Orthoclane
Mohs Hardness Scale
Scale Number
2 min
9
Common Object
Masonry Drill Bit
8.9)
Steel Nail (55)
Khille/Glass
Plate (5.5)
-Fuorte
Copper Penny (3.9
Gypsun
2
1
19. A geologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. Based
on this information, the sample mineral has to be softer than
O A fluorite.
OB. orthoclase.
OC. corundum.
O D. apatite.