Talc is the softest mineral that is known to mankind. It can be scratched by just your fingernail! Titanite is so multicolored, it looks like a billion different minerals, when in reality, it's only one. It is colored red, white, brown, black, yellow, green, and gray. Hematite is magnetic, and has no cleavage. Chrysoberyl is the third hardest mineral. it is a pale yellow, kind of like topaz.