Definition of "wolframite" [wol•fram•ite]

• Any of several red-brown to black minerals with the general formula (Fe,Mn)WO4, which constitute a major source of tungsten. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The minerals in question—cassiterite, columbite-tantalite, gold and wolframite—are widely used in consumer electronics and other products, although Congo supplies no more than 20% of global demand for these raw materials."
• "On April 23rd, Republican senator Sam Brownback introduced the Congo Conflict Minerals Act of 2009, cosponsored by senators Russ Feingold and Dick Durbin, which would require American companies mining coltan, cassiterite, and wolframite to report annually to the Security and Exchange Commission (SEC), the agency that regulates American financial markets, to disclose the country of origin of the minerals to the Securities and Exchange Commission."
• "Like the activists who lobbied for the legislation, Dodd-Frank assumes that minerals such as gold, wolframite, coltan and tin, which are extracted from areas under the control of armed groups, drive the conflict, and therefore, curbing the trade would bring peace to the region."