![](https://www.nomin.no/getfile.php/133330-1512038574/Bilder%20nomin.no/Historie/Galleri/1977%20artikkel%20RB%201x%200%2C435.jpg%20%28content%29.jpg)
In 1977 a close cooperation with the family-owned company Omya AG began. Omya AG was a global market leader in processing of calcite marble fillers and pigments. Hustad Kalk og Marmor AS was subsequently split into two companies: the raw material supplier company Hustadkalk AS, owned by the Steinsvik family, and the processing plant Hustadmarmor AS whose ownership was shared 50/50 between Hustadkalk and Omya.