Gunther Salt Company St.Louis based producer of salt for a variety of industrial uses. Includes details of salt mining and production. http://www.gunthersalt.com/

China Haicheng Talc Plant Supplier of talc products,magnesite, and quartz. http://www.china-talc.net/

Sekyung Corporation Supplier of North Korean magnesia clinker 9010. http://www.sekyungcorp.co.kr/

Sibelco Producer of silica sand and flours, cristobalite, nepheline syenite, and ball clay. http://www.sibelco.be/

Gandhara Minerals & Stones Pakistani supplier of mica, limestone, barrite, and salt. Samples available. http://brain.net.pk/~mksons/gandhara.html

Magnesia International.com Consortium of suppliers of magnesium oxide and magnesium hydroxide products. http://www.magnesiainternational.com/

Rapra International Indian manufacturer and distributor of mineral powders, including calcite, ground calcium carbonate, talc, mica, diamaceous earth, kaolin and quartz. http://rapra_microns.tripod.com/

Gilsonite and Specialty Asphalt Producer Producer of gilsonite, North American Asphaltum, uintaite, and specialty asphalt products. http://zieglerchemical.com

Zoutman Industries Salt producer. http://www.zoutman.com/

Koch Carbon, KOMSA, C. Reiss Coal Dealers in petroleum coke, coal, slag, cement, clinker, and related products. http://www.kochcarbon.com

Xinyi Kaida Silica Co., Ltd Chinese manufacturer of high purity silica sands, crystal powder, and fused silica. http://www.kaidasilica.com/xykaida/

Swala Gem Traders Distributor of gemstones directly from the mines, including tanzanites, tsavorites, rhodolites, tourmalines from East Africa. http://swalagemtraders.com

Society of Exploration Geophysicists Worldwide professional society concerned with geophysical issues. Most members are located in North America. http://www.seg.org