* Rhombohedral: This is the most common crystal form of hematite. It has a shape like a flattened cube with six sides that are parallelograms.
* Scalenohedral: This form is similar to rhombohedral but with more acute angles. It often appears as sharp, pointed crystals.
* Tabular: This form is flat and plate-like.
* Oolitic: This form is composed of small, rounded grains of hematite.
It's also important to note that hematite can be found in other forms, such as:
* Massive: This refers to a dense, solid form without distinct crystal shapes.
* Earthy: This form is powdery and crumbly.
So, while hematite is often associated with rhombohedral crystals, it can have a wide range of appearances depending on its formation conditions.
