Which conclusion can be made based in the information in the chart?
a) calcite is harder than apatite.
b) quartz is harder than topaz.
c) fluorite is harder than feldspar.
d) gypsum is harder than talc.

Option (D)

Explanation:

The given image is the Mohr's hardness scale. This is a standard hardness scale named after the scientist named Friendrich Mohr which shows the hardness of the minerals ranging from 1 to 10. Here, Talc is the mineral that has the least hardness, whereas the mineral Diamond is the hardest mineral whose hardness is 10.

The mineral of hardness 1 to 2 are easily scratched by a finger nail.

Gypsum is a soft, evaporite mineral that is harder than the Talc which is a clay mineral. Talc has a hardness of 1 and Gypsum has a hardness of 2. So from the Mohr's hardness scale, it can be concluded that Gypsum is harder than Talc.

Hence, the correct answer is option (D).

1 and 6 for apex