Boron-bearing magnesian skarn, developed at the contact of igneous bodies of Upper Cretaceous age with sequences of Triassic dolostones.
Ref.: Ş. Marincea: "Suanite in two boron-bearing magnesian skarns from Romania: data on a longtime ignored mineral species", Neues Jahrbuch für Mineralogie - Abhandlungen 182:183-192 (2006)