The Ruby Hill Project is located along the southeastern end of the Battle Mountain/Eureka gold trend. The Eureka gold mining district exposes a nearly continuous sequence of Cambrian and Ordovician sedimentary rocks approximately 10,000' thick consisting of primarily carbonate units with subordinate shale and quartz sandstone.

Mineralization at Ruby Hill is characterized by early polymetallic, intrusive-related carbonate replacement and skarn deposits that have been overprinted by younger Carlin-type precious metal mineralization.

Within the Property area, two styles of mineralization occur:
• Early polymetallic (Au-Ag-Pb-Zn) skarn or carbonate replacement deposit (CRD): Blackjack and TL).
• Late Au±Ag Carlin-type: East Archimedes, West Archimedes, 426, Ruby Deeps, Mineral Point zones.

The polymetallic skarn and CRD style is the oldest mineralization event recognized at the Property and related to emplacement of the Cretaceous intrusive units. The precious metal-rich Carlin style overprints the older CRD event and interpreted to have developed during early-middle Cenozoic (Eocene) times, similar to other Au-Ag deposits of the Battle Mountain/Eureka Trend. Mineralization is largely controlled by lithology and structure.

Gold-silver mineralization occurs broadly as a near N-trending zone (Mineral Point Trend), consisting of smaller zones of structurally and lithologically controlled deposits (East and West Archimedes, 426, Ruby Deeps, Mineral Point, Achilles, and Hector). Mineralization, both Au-Ag and Au-Au-Pb-Zn is primarily hosted within the Windfall and Goodwin Formations, and within the Hamburg Dolomite. Combined mineralization spans an area approximately 12,000 ft long, 9,000 ft wide, at the maxima, and spans from surface to approximately 2,400 ft below surface.

Mineralization is focused along high- and low-angle faults, lithologic contacts, fold axis, and sanded plus breccia zones.

Gold occurs as free grains within the oxide portions along with iron oxides, and associated with sulfide minerals (pyrite, arsenopyrite, arsenian pyrite, realgar, and orpiment) within the unoxidized portions of the deposits. Within the oxide horizons, petrographic work for samples from the Archimedes deposits “…indicate(s) that the gold was originally associated with pyrite grains, with no evidence of silica encapsulation. Higher grade gold mineralization occurs in zones of jasperoid and decalcified limestone,” (Resource Evaluations Inc., 2005).

The West Archimedes deposit of the Ruby Hill Gold Mine is developed by an open pit in an area previously mined for polymetallic deposits by underground methods. A mill, haul roads, leach pads, and waste dumps are also present on the property.

The Ruby Hill operation consists of an open pit mine, two waste rock facilities, a two-stage crushing system, a ball mill (inactive), thickener (inactive), belt filters (inactive), ore conveying and stacking system, a multi-cell heap leach facility, a pregnant solution tank and overflow pond, two storm water ponds, an Adsorption-Desorption-Recovery (ADR) Plant, a precious metals refinery, associated interconnected pipelines, and support buildings.

Open pit mining at Ruby Hill is now concluded with leaching to continue into 2022.