Zhejiang Changshan Longshan Calcium Carbonate Co., Ltd.
is the key company of Quzhou city and the member of Shanghai Calcium Association Unit of national inorganic salt information centre.
http://www.lscaco3.com/

Grandorth Specialty Chemical
Manufacture non-toxic calcium zinc pvc stabilizers, calcium carbonate, and pvc additives for soft and rigid pvc products.
http://grandorth.com/

Zhejiang Jiande Jinchun Fine Calcium Co., Ltd
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http://www.cnjinchun.com

Resinas Industriales Sudamericanas S.A.
Proveedor de calcio para consumo humano (farma - alimentos - cosmética). Carbonato, citrato, gluconato, lactato, lactogluconato. Polvos y micronizados
http://www.carbofarma.com.ar/

Impadoc S.A
Operates fields of high purity calcium carbonate in Columbia for industrial use. In addition the company manufactures products such as kaolin, talc, dolomite, barite, and calcium sulfate as dehydrate and hemihydrate.
http://www.impadoc.com/

Omya, Inc.
Providing calcium carbonate to the paint and pigment industry.
http://www.omya-na.com/

Bryozoa
Information from Wikipedia on these colonial organisms that make hard skeletons of calcium carbonate, superficially resembling coral.
http://en.wikipedia.org/wiki/Bryozoa

Weifang Hongyuan Chemical Co., Ltd.
located at the east Shandong Weifang oceanic chemical high technology development area, which is near by the south of the Laizhou bay of Buohai.
http://www.wfhongyuan.com

Pumex
Distribute pumice, calcium carbonate, talc, perlite, glass beads anmd a range of other materials, Used as fillers for plastic polymers.
http://www.pumex.co.uk/

Chemical & Mineral Industries Pvt. Ltd.
Precipitated Calcium Carbonate india,Mineral limestone Rajasthan,Activated Calcium Carbonate India,Manufacturercalcium carbonate products, HYDRATED LIME, DOLOMITE POWDER, QUICK LIME, TALC POWDER,CHINA CLAY POWDER,BARYTES POWDER,WHITING POWDER,QUARTZ POWDER,Precipitated Calcium Carbonate india, Mineral Powder ManufacturerActivated Calcium Carbonate india, CHEMICAL & MINERAL INDUSTRIES
http://www.cmipl.com