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

Question

Quizplus · Accepted Answer

The Mohs scale of mineral hardness ranks minerals based on their ability to scratch another mineral. A glass plate has a hardness of about 5.5. Therefore, minerals harder than glass must have a Mohs hardness greater than 5.5. Feldspar (6), quartz (7), topaz (8), corundum (9), and diamond (10) all have hardness values greater than 5.5, making them capable of scratching a glass plate.

Which Minerals That Make Up the Mohs Scale Are Harder