Chrome Lignite 2 : Mined lignite, usually leonardite, to which chromate has been added. The lignite can also be causticized with either sodium or potassium hydroxide. (Bul 10C)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}