What grade is Ireland's Donegal Grey Quartzite? Ask Other Questions
I dont know the exact grade of Irelands Donegal Grey Quartzite. However, Quartzite grades are determined by the stones durability and strength, and they vary according to the location of the quarry. You may need to contact a local quarry or stone supplier to get specific information about the grade of a particular quarrys Donegal Grey Quartzite.