The GRG (gravity recoverable gold) test is a widely accepted industry test used to determine the theoretical maximum amount of gold that can be recovered from a sample. It is also the most popular test performed in KRTC facilities.
This test is a multi stage test that utilizes the KC-MD 3 laboratory Knelson Concentrator with sequential grinding. A 30kg of sample crushed to -1.7mm (sample crushing can be arranged at an extra charge) is required to perform a GRG test.
The price of the GRG test includes all assays at an independent lab and a comprehensive metallurgical test report detailing testing results and analysis.
Share Your Knelson Experience
"On a pilot project on 'Riverbed Alluvial Gold Mining' at the University of Zimbabwe, we achieved 100% gold recovery from sluice box pre-concentrates using the 7.5" pilot scale Knelson. It was fantastic to see real gold in its true colour on such a scale."
- Chris Magombed - Norwegian University of Science and Technology, Norway
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The GRG (gravity recoverable gold) test is a widely accepted industry test used to determine the theoretical maximum amount of gold that can be recovered from a sample. It is also the most popular test performed in KRTC facilities. 
