Which minerals that make up the Mohs scale are softer than a glass plate but harder than your fingernail?
A)beryl, garnet, tourmaline
B)calcite, fluorite, apatite
C)feldspar, quartz, topaz, corundum, diamond
D)gypsum and talc

Question

Quizplus · Accepted Answer

Calcite has a hardness of 3 on the Mohs scale, fluorite has a hardness of 4, and apatite has a hardness of 5. All three minerals are softer than a glass plate (which has a hardness of 5.5) but harder than a fingernail (which has a hardness of 2-2.5).

Which Minerals That Make Up the Mohs Scale Are Softer