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
"Iduapriem mine operates a new KC (Knelson). We are still optimizing this unit. I have just discovered that the amount of water added to the scalping screen feeding the KC is very important. Based on this knowledge we have now started producing half of our gold from the KC. It is amazing! What a silent and wonderful performer!"
- Bernard Ador, Metallurgist - AGC-Iduapriem Gold Mine, Ghana
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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. 
