There is no specific grade assigned to Irans Azarshahr Grey Andesite. The grade of a stone typically refers to its quality or suitability for certain applications, such as construction or decorative purposes. The grade of a stone can vary based on factors such as appearance, durability, strength, and usability. To determine the specific grade of Irans Azarshahr Grey Andesite, it would be necessary to consult the relevant industry standards or specifications, or to contact a supplier or expert in the field.