Edison, Beryl & Dewy

Abundance of Pegmatite Swarms and Brownfield Exploration Prospects Across most prospective 22,00 Ha in the Black Hills

These projects spans across 226 BLM Lode Claims covering approximately 4,665 acres of prime mineral-rich land. Within this expansive area, LCT-pegmatites are found in multiple discontinuous swarms that trend from north to south, indicating significant geological potential.

Central to our project are the renowned Helen Beryl Mine, known for hosting an ultra-high concentration zone of spodumene, and the Eruption Lode, recognized for its remarkable spodumene deposits. Securing claims over these historically significant mines has positioned IRIS for success, with both sites identified as high-priority early drill targets for exploration and development. Join us as we uncover the wealth of opportunities within these strategic mining locations

Dewy Mine

The Dewy Mine site boasts a rich geological landscape featuring LCT pegmatites that form numerous discontinuous swarms, aligning with several historic lithium mines along the strike.


  • High Climb Pegmatite: Previously mined for amblygonite, beryl, mica, and feldspar, the High Climb pegmatite offers a treasure trove of minerals. This pegmatite extends over 100 meters on the surface, with an open-cut mine intersecting its 30-meter width.

  • Hunter and Louise Mine: Comprising six small open-cut pits primarily targeting mica and spodumene, the Hunter and Louise Mine showcases mineral-rich pegmatite stretching over 200 meters at the surface, with widths averaging 10 meters.

  • Tin Queen Mine: With three open-cut pits initially focusing on tin extraction, the Tin Queen Mine later shifted its production to mica, amblygonite, and beryl. The mine also holds a variety of lithium minerals including spodumene and lithiophilite-triphylite, reflecting its diverse mineralogical significance.

Uncover the extensive mineral wealth and historical significance of the Dewy Mine as we delve into its rich mining heritage and potential for future exploration and development.

Helen Beryl Mine

Project includes the historic Helen Beryl Mine (hosting a zone of ultra high concentrated spodumene) and the Eruption Lode (known for its high concentration of spodumene).

Spodumene rich ore from the Helen Beryl Mine

Edison Mine

The Edison Mine commenced production in 1917, with a focus on lithium spodumene as the main product between 1942 and 1944. Additionally, beryllium, feldspar, mica, and tantalum were extracted as valuable by-products during this period.
its 30-meter width.

Initially operated through a series of open-cuts, the deposit saw further development with the construction of two adits driven eastward from the lower open-cut. These adits were later interconnected by a drift along the eastern side of the pegmatite, showcasing the evolving mining techniques employed at the site.

The 1942 USGS report provides valuable insights into the Edison Mine, detailing log descriptions of 12 drill holes within the mine itself and one in the nearby Bull Con Mine. The report also includes an annual production estimate, shedding light on the mine’s productivity and resource potential.