Nevada Zinc Corporation provided an update on the progress of the multiphase pilot plant program to produce zinc sulfate monohydrate currently being conducted by Hazen Research Inc. ("Hazen") for the Company's Lone Mountain zinc project. The Company has completed bench-scale tests on the representative mineralized material (bulk sample) from the Lone Mountain site resulting in the successful completion of gravity separation tests to concentrate zinc, separation of gangue (waste) minerals dolomite and calcite, and successful acid leaching tests. Based on filtrate assays, the leaching test showed recovery of 86% zinc from the neutralized leach, decreased soluble silica to 0.01% and precipitated aluminum and iron, which are deleterious elements for the envisioned process flowsheet. The separation of zinc from zinc-bearing oxide ores is known for its metallurgical challenges in the zinc mining industry as zinc oxide ores may be composed of several zinc-bearing minerals. Additionally, soluble silicon dioxide in the oxide ore can cause the formation of silica gel in the solution which can negatively impact the acid leaching process. Having successfully addressed these challenges is a critical achievement by the Company for the development of the Nevada Zinc's Lone Mountain zinc project. To date, Hazen has conducted extensive research and studies and performed several heavy liquid separation, gravity separation, flotation, and leaching experiments on the zinc-bearing minerals of hemimorphite and smithsonite. Gravity separation experiments vigorously tested different scenarios of concentrate preparation and refined the envisioned process flowsheet. Zinc concentration tests via gravity separation methods were followed by acid leaching tests to further validate and optimize the potential process flowsheet for cost-effective zinc sulfate monohydrate production. Based on the conducted experiments and tests to-date, a direct flotation circuit can be avoided simplifying the envisioned design which now includes five main stages: Ore crushing and grinding; Gravity separation; Acid leaching; Cementation and solvent extraction; and Crystallization. The next phase of the bench-scale testing program to produce zinc sulfate monohydrate has now commenced and the Company will provide updates as material results become available. While the program experienced some delays due to required process optimization test work, follow-up tests, and further technical studies, the program remains on track and the Company expects the program to be completed by the end of the third quarter of 2021.