Hard Rock Lithium Deposits are also known as Pegmatite deposits. Pegmatite is a coarse-grained intrusive igneous rock formed from crystallized magma below the Earth's crust. Pegmatite lithium deposits can contain extractable amounts of a number of elements, including lithium, tin, tantalum and niobium.

The Company has the largest pegmatite land holdings in the Southwestern USA covering the White Picacho Mineral District, which includes widespread LCE pegmatites, many of which underwent 1940—1950’s vintage prospecting and small-scale mining for lithium minerals.

The San Domingo Project contains hundreds of pegmatite outcrops, locally containing lithium minerals such as spodumene, with lesser lepidolite, montebrasite, amblygonite and eucryptite.