What is the hardness of mica on mohs hardness scale?

Answer 1

Schist is a composite material made up of a mixture of several minerals, each of which have different mohs hardness. Schist is made mostly of quartz (mohs 7) and feldspar (mohs 6) but also includes minerals such as chlorite (mohs 2) and hornblende (mohs 5). Schist has no real mohs hardness, but a composite of its constituents of approximately 6.

Answer 2

From 4 to 5 on the Moh's scale, which is only indicative of its relative hardness against other rocks and minerals. Bull crap

Answer 3

Phyllite is a rock composed of multiple minerals and is therefore not subject to classification on the Mohs scale of mineral hardness.

Answer 4

The hardness of shale would be 3 on the Mohs Scale of Hardness.

Answer 5

Shale does not have a Mohs hardness listing as it's a rock, not a mineral.

Answer 6

Schist is a rock of varying hardness depending on its constituent minerals. Rocks are not normally assigned a Mohs hardness, as it applies to the hardness of individual minerals.

Answer 7

Yes, scoria is basically Basalt.

Answer 8

7