Oct 28, 2019 HC % 30.6. 37.2. 31.3 ... The pilot plant will allow for confirmation of the flowsheet at a larger design and provide copper sufficient concentrate to operate a molybdenum-rhenium recovery ... Oct 28, 2019 Gold is assayed using a 30 g split, Fire Assay (FA) and AA finish (ALS code Au-AA23). About Cornerstone Cornerstone Capital Resources Inc. is a mineral exploration company with a diversified portfolio of projects in Ecuador and Chile, including in the Cascabel gold-enriched copper porphyry joint venture in north west Ecuador.