A H Knight (Jinling) Co Ltd
Ado Mining
Agrolats Mineral
Alfred H Knight International Ltd
AM2F Energy Inc.
Anaconda Barite
Ana-Lab Corp.
Anglo Pacific Minerals Ltd
Arrows Up Inc.
Ashapura International Ltd
Baker Hughes Inc.
Bara Kali Ltd
Baramin SA de CV
Barit Maden Türk AŞ
Baritrade LLC
Barton International
The Barytes Association
Bastion Capital Group
Broychim
Canadian Energy Services
Changqing Proppant Corp.
Chemical Products Corp.
Cimbar Performance Minerals
CPC Sojitz Mineria
Cooper/Consolidated
CoorsTek
Coretrack Ltd
DS Norden
Ecutec Barcelona SL
Elementis Specialties
Excalibar Minerals LLC
Gimpex Ltd
Group Curimbaba
Guizhou Barite Minerals Imp. & Exp. Co. Ltd
Guizhou Tianhong Mining Co. Ltd
Gulf Minerals & Chemicals LLC
Halliburton Energy Services
Hectatone Inc.
Heyl & Patterson Inc.
Imerys Oilfield Solutions
Indumin Group
IHS Inc.
M/G Transport Services LLC
Mobius Chemical & Mineral Supply Corp.
Milwhite Inc.
National Industrial Sand Association
Neuman & Esser GmbH
North African Mineral Resources
Oil & Gas Advisor
Omya International AG
OPF Enterprises
Oren Hydrocarbons M.E. Inc.– Dubai
Pacific Rim Brokers
Parsons Terminal Co.
Poittemill
Prince Minerals Inc.
Prodexa de Mexico SA de CV
Provale Group
Resource Capital Funds
Rock Fin Minerals
Rohini Oil Field Chemicals
Roskill Information Services Ltd
RP Minerals
RUA Bulgaria
Saint-Gobain Proppants
Sibelco Europe
SNUMM Societe Nouvelle Union des Metaux Maroc
Solex Thermal Science
Solvay Minerals SA
South American Silica Corp.
Southwest Land & Minerals Corp.
ST Equipment & Technology LLC
Statoil
Steinbock Minerals Ltd
Superior Weighting Products LLC
Trimex International
Unimin Energy Solutions
US Geological Survey
Viking Shipping Co. AS
Western Lithium USA Corp.
Wisco
Mark Zdunczyk Consultant Geologist