Cornerstone Capital Resources Inc. provided an update on its Bramaderos gold and copper joint venture in southern Ecuador in which it has a 12.5% interest carried by JV partner and project operator Sunstone Metals Ltd. through to the start of commercial production. The results from all holes drilled at Brama-Alba show clearly that higher grade mineralization occurs in sub-domains within the larger 1.2km-long Brama-Alba system and that these higher-grade domains cluster in the upper 400m. The results provide more firm evidence that Brama hosts a substantial gold-copper porphyry system.

There is also potential for this system to extend significantly to adjacent targets Melonal (west) and Playas (east). These areas are expected to be drill tested in 2022. Gold equivalent results from all drill holes at Brama-Alba and clearly show the broad significant grades identified in this deposit.

Early-stage metallurgical test work completed on a range of mineralization styles from the Brama-Alba gold-copper porphyry deposit was undertaken by Base Metallurgical Laboratories in Kamloops, British Columbia and was managed by Brisbane- based specialist engineering consultancy group DRA Global. Sighter metallurgical test work completed on the breccia and diorite lithologies, of the Alba and Brama deposits, yielded very encouraging results. With a combined flotation and leach circuit, the results indicate that recoveries in excess of 86% for copper and 88% for gold can be achieved when targeting a saleable concentrate grade of above 20% copper.

Further test work, including alternative reagent and grind size regimes, will focus on improving recovery responses in a flotation -only circuit configuration to determine whether that configuration can be justified. Additional optimization testing of the current flotation-leach selection, to further improve recoveries, will also be conducted. Further details are provided below.