While it's formed from the mineral barite, which is a sulfate mineral, the overall rock classification is sedimentary due to its formation process.

Here's why:

* Formation: Barite forms through the precipitation of barium sulfate from hydrothermal fluids, often in association with other minerals.

* Deposition: These precipitated barite crystals accumulate in layers, often in sedimentary environments like ocean basins or lakes.

* Cementation and Lithification: The barite crystals are then cemented together by other minerals, creating a solid rock mass.

Therefore, barite rock is considered a sedimentary rock due to its formation through the accumulation, deposition, and cementation of mineral grains in a sedimentary environment.