Not sure what you mean but A) limestone IS natural anyway, and B) some limestones are relatively soft while in the middle of their unit but harden once quarried and exposed to the air.
yes limestone is natural,is it
Harvesting and seasoning of lumber includes the process of cutting and transporting the previously harvested and seasoned lumber but it is harvesting killing and seasoned natural.
Is limestone natural or man made
limestone
yes
Is limestone natural or man made
Is limestone natural or man made
limestone
Bauxite, limestone
Limestone
coal, natural gas, limestone, marble, and asbestos
in its natural state limestone is normally pure white