Question

Which substances are harder than apatite, but softer than corundum?

A.fluorite and quartz

B.topaz and quartz

C.diamond and quartz

D.talc and gypsum

Answer 1

B. topaz and quartz

Step-by-step explanation:

Hardness of a mineral is measured using Moh’s scale.

Hardness depends on the bonding attraction between the atoms and the size of the atoms present in the mineral

Mineral Hardness(Moh’s)

Talc 1

Gypsum 2

fluorite 4

Apatite 5

Topaz 8

quartz 7

Corundum 9

Diamond 10

Option B topaz and quartz is the Answer