Chlorite, a green colour mineral is mainly derived from the decomposition of

Answer: Option D

Chlorite is a green-colored mineral that belongs to the clay mineral group and is commonly formed during the alteration or decomposition of other minerals.

It is primarily formed by the decomposition of minerals like Augite, Biotite, and Hornblende, which are all common minerals in igneous rocks.

Option A: Augite is a pyroxene mineral, and when it undergoes weathering, it can transform into chlorite.

Option B: Biotite is a mica mineral that can also decompose to form chlorite under certain conditions.

Option C: Hornblende, a type of amphibole mineral, can also undergo alteration to form chlorite.

Therefore, the correct answer is Option D: All of these, as chlorite can be derived from the decomposition of Augite, Biotite, and Hornblende.