Granite doesn't have a single, specific grain shape. It is an igneous rock with a phaneritic texture, meaning its individual mineral grains are large enough to be seen with the naked eye.

Here's a breakdown of the characteristics:

* Grain Size: The grains in granite vary in size, but they are generally coarse-grained. This means they are larger than fine-grained rocks like basalt.

* Grain Shape: The individual mineral grains within granite can have various shapes, including:

* Equant: Roughly equal in all dimensions, like cubes or spheres.

* Tabular: Flattened or sheet-like.

* Prismatic: Elongated and columnar.

* Irregular: With no defined shape.

* Overall Texture: Despite the variety in grain shape, the overall texture of granite is granular due to the presence of visible, distinct mineral grains.

So, while there is no singular "grain shape" for granite, it is characterized by its coarse, visible, and diversely shaped mineral grains.