Construction unit

The invention relates to an environmentally friendly construction unit (brick, block etc.) comprising gypsum, clay and aggregate, and not including tar or possibly cement or organic matter. Methods of making the said construction units include mixing the above ingredients, adding water to the mixture such that water is present at a rate of 8-40 % of dry mass, compacting, compressing or extruding the mixed material, and allowing to dry. The gypsum used may be recycled gypsum or flue-gas desulphurization gypsum. The construction unit may be unfired. The invention also relates to a raw mix for making the said construction unit.