1. Aravali Onyx
2. Arihant MinChem
3. Beihai Industry (Group) Co. Ltd.
4. Calcinor
S.A.
5. Carmeuse
6. Carri?re de Merlemont
7. E. Dillon & Company
8. Essel Mining & Industries Limited
9. Graymont Limited
10. Imerys S.A.
11. JFE Mineral & Alloy Company,Ltd.
12. Lhoist Group
13. Liaoning Jinding Magnesite Group Co. Ltd.
14. Linwood Mining & Minerals Corporation
15. Longcliffe Quarries Ltd.
16. Martin Marietta Inc.
17. Mississippi Lime Company
18. Nittetsu Mining Co. Ltd.
19. Nordkalk
20. Omya AG
21. Raw Edge Industrial Solutions Limited
22. Sch?ndorfer GmbH Dolomitwerk
23. SCR-Sibelco NV
24. SHANGHAI ZENITH MINERAL CO.LTD
25. The National Lime and Stone Company
26. United States Lime & Minerals Inc.
27. Vardar Dolomit
28. WJ Murdoch & Co Pty Ltd.
29. Yoshizawa Lime Industry CO. LTD.