Construction Materials are the resource that the majority of all your buildings and equipment will be made. In NO Horizons there are many, varied methods of creating a society, but each of them needs to build things. How these Construction Materials are created is not important; only the end result is. In this way a Culture may use any number of different methods to obtain Construction Materials (eg. Quarrying, Growing polymers, carving Ice, using telekinetic fields, trade, etc) and then only specialised resources will be needed to build their buildings and equipment. This allows for maximum flexibility for each Culture to pursue multiple avenues of resource gathering and does not tie any Culture down to one particular resource-gathering method. They are free to use whatever means they can to achiever the same goal.