How to Prevent Vertice/Normal Seams Visible on Mesh?

I've got some simple stylized rocks that I've created for a scene. They look correct in Maya without any scenes or vertices visible; however, when imported into Unity, I can clearly see some of the vertices at the seams of the normal map. If I remove the normal map, I no longer see the seams, but the rock also appears as a smoothed out blob.

I've tried turning off mip maps, so that isn't he issue. It is just using the standard shader with nothing but the mesh and the normal map applied. Not sure what else to try, especially since I'm not really sure what the root issue is.