Question

The mineral which is almost black but gives brown streak is?

(a) Magnetite

(b) Garnet

(c) Hornblende

(d) Chromite

The question was asked in a job interview.

This interesting question is from Physical Properties topic in portion The Study of Minerals of Engineering Geology

Answer 1

Right answer is (d) Chromite

Easiest explanation: Chromite and magnetite resemble closely in their other physical properties: both are almost black. These may be at once distinguished by their streaks: brown for chromite and black for magnetite.