Which of the following is not a true statement?
A) Orthoclase, quartz, and topaz will be scratched by corundum on the Moh's Hardness Scale
B) Halite, calcite, apatite, and orthoclase are scratched by fluorite on the Moh's Hardness Scale
C) It is possible for the object or mineral that is being used to scratch something else to leave a trail of its own powder on the surface of a mineral
D) It is important to rub away the powder trail and feel the surface of a mineral for a groove to determine if the mineral has indeed been scratched

Question

Quizplus · Accepted Answer

Fluorite ranks lower on the Moh's Hardness Scale than apatite and orthoclase, meaning it cannot scratch them. The Moh's Hardness Scale is a comparative scale from 1 to 10 used to determine the hardness of minerals, with 1 being the softest (talc) and 10 being the hardest (diamond). Fluorite is ranked at 4, while apatite and orthoclase are ranked higher at 5 and 6, respectively. Therefore, fluorite cannot scratch minerals that are harder than itself.

Which of the Following Is Not a True Statement