11. A student has four known minerals and one unknown mineral. The student wants to perform a scratch test to find out the hardness of the unknown mineral. The known minerals and their value on the Mohs Hardness Table are:
Quartz : 7
Fluorite : 4
Calcite : 3
Talc : 1
Which scratch test result would provide the most information about the hardness of the unknown mineral? (1 point)
The mineral is scratched by fluorite but not scratched by calcite.
The mineral is scratched by quartz but not scratched by talc.
The mineral is scratched by both quartz and fluorite.
The mineral is not scratched by calcite or talc.
1 answer