/ SLAGGY RED COBALT-OCHRE. 515 It occurs in thin crusts, and sometimes reniform. Externally it is smooth. The lustre is shining and resinous. The fracture is conchoidal. It is translucent. It is soft. It is brittle. / Geognostic and Geographic Situations. It occurs in veins along with other ores of cobalt, in the mine of Sophia at Wittichen in Furstenburg. Use. All the three subspecies are valued as ores of cobalt, *nd are used in the preparation of blue colours. / K k 2 ORDER XVII.