The company also offers geological and engineering services for the exploration and production of metallic and nonmetallic minerals.

Other mineral resources are tin, manganese, platinum, iridium, osmium and other nonmetallic minerals.

Antofagasta's economic development is mainly based on copper mining and nonmetallic minerals such as nitrate and iodine.

Czechoslovakia did supply most of its own requirements for nonmetallic minerals to support the manufacture of building materials, glass, and ceramics.

It has a Mohs hardness of 4 to 5 and a specific gravity of 8.5 to 9.5, quite high for a nonmetallic mineral.

The largest commodities were coal, chemicals, farm products, nonmetallic minerals and intermodal.

China produced sufficient quantities of most nonmetallic minerals to meet domestic needs.

About 50 nonmetallic minerals are present in significant amounts.

China also produces a fairly wide range of nonmetallic minerals.

Libres has some refining of petroleum and of nonmetallic minerals, as well as furniture making.