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

Question

Quizplus · Accepted Answer

Gypsum and talc are the only minerals on the Mohs scale that are softer than a fingernail, which has a hardness of about 2.5. Talc has a hardness of 1, and gypsum has a hardness of 2.

Which Minerals That Make Up the Mohs Scale Are Softer