Black Crystal Property
Hill City, South Dakota
The Black Crystal Property is near Hill City, South Dakota. Historically the site has been associated with the Hill City Mining District which is now part of the Black Hills National Forest. The Black Crystal Property was closed at the time of data entry with no known plans to re-open. Production size when active was considered to be small. Mine operations consist of surface and underground workings. There is one known shaft. Subsurface depth reaches a maximum of 18 meters (60 feet). The ore mined is composed of wolframite with waste material consisting primarily of quartz. The mineralization at this location is from the Neoproterozoic era 1.00 to 0.54 billion years ago. The Black Hills of the Interior Plains characterize the geomorphology of the surrounding area.
Additional textual information about a site or mine.
CENTER OF SECTION 10
Formal or informal mining district names.
Workings at the site.
THE TRENCH IS 7 FEET DEEP, EXTENDING ALONG THE STRIKE OF THE VEIN. THERE IS SOME DRIFTING AND CROSSCUTTING FROM THE SHAFT.
Geological materials at the site.
Tectonic setting in which the site or deposit is situated.
Physiographic area where the resource is found.
Other deposits in the same region.
J. R. Extension Gold Occurrence
Tin Belle Mine
J. R. Extension Silver Mine
Tin Belle Tin Prospect
Carnbray Tin Prospect
Cumberland Silver Mine
Golden Slipper Gold And Silver Gold Mine
Joe Dollar Mine
Joe Dollar Mine
Joe Dollar Mine
* Mine bounds on map indicate the general area that a mine occupies. For an detailed map, refer to the overseeing BLM field office.
** The mine central point is based on an average of the mine's bounding box(es) and does not necessarily fall on the claim itself.
1 World-class significance is determined by total endowment of the contained commodity. This includes all past production and remaining reserves. Each commodity is considered separately and commodities cannot be combined to arrive at a significant size. The tonnage thresholds are from the mine model grade-tonnage studies. As of June 2008, many entries were classified as significant under less strict rules.
Learn more about the Bureau of Land Management, Public Land Survey System, and mining claims.
Understanding Claim Ownership
We receive lots of emails from people who find their name or a relative’s name on our site and want to know if this means they have some right to the land listed under that name.
Understanding BLM Administrative Areas
Whether it is filing a mine or researching one, the administering BLM office is going to be the definitive source.
Understanding Location Data
Mine handled by the Bureau of Land Management are not mapped by latitude and longitude, instead, these mines harken back to the Public Land Survey System.
A “township” can refer to two different things. Both are part of the PLSS measurement system but have different uses.
Join our mailing list to get alerts for mine listing updates, new features, and special opportunities.
Search for owners by first name, last name, company, location, etc.
Browse mine owners by name
Browse mine owners by location
Browse mine owners by state in the United States of America
Browse owners by category (corporation, agency, private)
Browse owners by interest relationship (partner, holder, agent, etc.)
ORE OCCURS IN SMALL IRREGULAR MASSES. ONE UNPATENTED CLAIM OF APPROXIMATELY 20 ACRES.