Answer:
Quartz- can only be eroded by
Chemical weathering- Although quartz is very hard on the mohs hardness scale, chemical weathering can still affect the minerals size and shape. Pollutants and natural disasters including acid rain affect the part of the monument made of this mineral.
Quartz is the only mineral in this case that only has one factor in its process of weathering. Physical weathering could not do any damage because if its strength.