Use the Mohs hardness scale to answer the following
question.
Mohs Hardness Scale
salter
Talc
0
fingernail
(2.5)
Gypsum
Calcite
Fluorite
Apatite
Orthoclase
Quartz
Topaz
Corundum
Diamond
10
harder
steel nail
(6.5)
glass
(5.5)
A sample can be scratched by glass but not by a fingernail. Which two
minerals could the sample be made of?
A. Apatite
B. Fluorite
C. Orthoclase
D. Gypsum