Hematite

Hematite is a very common mineral consisting of iron oxide. Its colour ranges from steel grey to almost black (specular hematite), brown to reddish brown, or red. The variety known as rainbow hematite exhibits colours similar to oil patches on water.

While the forms vary, they all have a rust-red streak. Hematite is harder than pure iron, but it is much more brittle.

The name hematite is derived from the Greek word ‘haimatites’ for blood.

Hematite
Colour Description
Black to grey to brown to red Hematite is responsible for the rich red colour of the planet Mars. It measures 5.5 – 6.5 on the Mohs scale.