However, "brownstone" can also refer to other types of brown stones, like:
* Brown marble: A metamorphic rock with a brown color.
* Brown granite: A igneous rock with a brown color.
* Brown limestone: A sedimentary rock with a brown color.
Therefore, to be more specific, you need to provide more context about the brown stone you are asking about. For example:
* What is the stone used for? (building material, sculpture, etc.)
* Where did you find it? (geographic location)
* What does it look like? (texture, grain, etc.)
With more information, I can give you a more precise answer about the name of the brown stone.