Investments in Joint Ventures (Tables)

12 Months Ended

Dec. 31, 2013

Investments in Joint Ventures [Abstract]

Investments in and advances to affiliates and joint ventures

Information about our investments in and advances to affiliates and joint ventures at December 31, 2013 is as follows:

	Ownership Interest	Accounting Policy
Ashapura Volclay Limited	50%	Equity Method
CETCO-Bentonit Uniao Technologias Ambientais Ltda.	50%	Equity Method
Egypt Bentonite & Derivatives Co.	30%	Equity Method
Egypt Mining & Drilling Co.	31%	Equity Method
Egypt Nano Technologies Co.	27%	Equity Method
Maprid Tech Cast, S.A. de C.V.	49%	Equity Method
Novinda Corporation	16%	Cost Method
Volclay de Mexico, S.A. de C.V.	49%	Equity Method
Volclay Japan Co., Ltd.	50%	Equity Method