Turquoise Mines of the Mojave and Northwest Arizona

Turquoise forms where water seeps through copper-bearing rock in a dry climate, and the Mojave Desert and northwest Arizona have plenty of both. In California, people mined turquoise near Halloran Springs, northeast of Baker, more than 1,400 years ago. In Arizona, Kingman turquoise comes from the Mineral Park copper mine in the Cerbat Mountains. Today you can see turquoise legally in museums and collect small amounts only where federal rules allow it.

What is turquoise, and why does it form here?

The U.S. Geological Survey's turquoise summary describes it as a water-bearing phosphate of copper and aluminum. It is a secondary mineral, meaning it grows after the host rock has formed.

It develops when rain or groundwater works its way through aluminum-rich rock that also contains copper. Per the USGS, it shows up most often in copper deposits in arid, semiarid or desert country. That is why the copper districts of the Mojave and Mohave County have yielded it.

The same USGS page says Arizona turquoise is mostly recovered as a byproduct at copper mines. In California, it lists deposits in San Bernardino, Imperial and Inyo counties.

What are the Halloran Springs turquoise mines?

The Halloran Springs district, also known as the Turquoise Mountain or Manvel district, lies about 25 kilometers (roughly 15 miles) northeast of Baker. A 1980 study by N. Nelson Leonard III and Christopher Drover examined its prehistoric workings, which cluster in three areas called West, Middle and East Camp.

The workings run from shallow pits to larger mines roughly 9 by 4 by 4 meters. The study looked at 184 stone hammers. Most were basalt, followed by quartz, and 24 were grooved or notched for a handle.

How old is the mining?

Two radiocarbon dates from the Bonnie Blue Mine, after correction, point to work around A.D. 510–530 and A.D. 1090–1120. The authors proposed three periods of mining:

The study also reports that trace-element tests tied 13 turquoise beads from Snaketown, a Hohokam site in Arizona, to the Halloran Springs source. The stone traveled far.

A companion paper by Drover uses ethnographic records of the Mohave and Chemehuevi as a framework for reading the district's archaeology. The National Park Service places Chemehuevi homelands in the Kingston, New York and Providence Mountains, west to Soda Dry Lake and south to the Whipple Mountains.

What happened to the old workings?

Leonard and Drover date the first claims by settlers to 1895–1898. Their 1978 fieldwork took place within the Apache Canyon Mining Company's claims. They write that modern mining or erosion has erased or hidden many of the old mines. They chose one study site partly because it was remote enough that rockhounds had likely taken few artifacts.

The USGS summary named the Apache Canyon Mine as the only California mine still producing turquoise commercially when it was written. We could not find a current public status for that mine.

Are the Halloran Springs sites protected?

Yes, the archaeology is protected by federal law. The BLM's Can I Keep This? page says the Archaeological Resources Protection Act makes it illegal to remove, damage or dig up cultural items on BLM land. Its examples include stone tools, beads, pottery and the remains of historic sites. Old stone hammers at a turquoise working fit that description.

If you visit the area, look and take photos only. Leave tools and debris in place. To report damage, BLM lists a 24-hour law enforcement dispatch line at (800) 637-9152.

Different rules apply if you cross into Mojave National Preserve. The NPS explains that 36 CFR 2.1 bars possessing or disturbing mineral resources in park units. If you are driving out from Victorville or Hesperia, our desert Route 66 day trips guide covers nearby stops.

Where does Kingman turquoise come from?

A KJZZ report says a family business, Colbaugh Processing, holds the turquoise mining concession for Turquoise Mountain at the Mineral Park mine. Mineral Park is an open-pit copper mine in the Cerbat Mountains northwest of Kingman. A family member told KJZZ his grandfather began mining there in 1962.

The USGS Geolex entry for Ithaca Peak describes Ithaca Peak and Turquoise Mountain as granite peaks in the Mineral Park area of Mohave County. A 1909 USGS report, Bulletin 397, mentions a small custom mill built at Mineral Park in the late 1870s. It also says Mineral Park once held the county seat, which moved to Kingman in 1887 after the Santa Fe Railway was finished.

Copper, not turquoise, is the mine's main business. Origin Mining places the site 12 miles northwest of Kingman and says it has produced copper, silver and molybdenum since 1964.

Is the Mineral Park mine operating in 2026?

Yes, as of the most recent public update (August 2026). Wheaton Precious Metals, which holds a silver stream on the mine, says Origin Mining, a Waterton Copper subsidiary, owns and runs it. A March 2025 report in The Bee said Origin bought the mine in 2015 and that it supports about 400 jobs in the area.

Wheaton's second-quarter 2026 results, released August 6, 2026, say Waterton had substantially finished commissioning the mill restart. Copper concentrate kept selling that quarter, and the first molybdenum concentrate sales followed.

Turquoise there is mined under a concession, and Mineral Park is a working industrial site. It is not a public collecting area. For more on the area, see our Kingman, AZ community guide.

Is there turquoise elsewhere in northwest Arizona?

Other Cerbat Mountains areas, such as Chloride, are often mentioned. We could not confirm them in an Arizona Geological Survey or USGS source, so we leave them out.

How can you see turquoise legally today?

Museums are the easiest way:

• Mohave Museum of History & Arts, Kingman. Its visitor page lists hours of Tuesday through Saturday, 9 a.m. to 4 p.m., with last entry at 3:30 p.m. As of November 2026, adult admission is $10. The museum lists turquoise among the minerals of the region.
• Mojave River Valley Museum, Barstow. The museum at 270 E. Virginia Way has free admission and is open every day but Christmas, 11 a.m. to 4 p.m. It covers local history, including mining.
• Phoenix. The former Arizona Mining and Mineral Museum is being reborn as the Arizona Mining, Mineral and Natural Resources Education Museum on the Capitol Mall. As of November 2026, the University of Arizona lists it as in development.

For another High Desert mining story you can visit, read about the Boron borax mine and Trona.

What are the rules for rockhounding on BLM land?

BLM's rockhounding page generally allows you to gather reasonable amounts of rocks, mineral specimens and semiprecious gemstones on public land. Collecting must be noncommercial, so you cannot gather to sell. BLM generally does not allow collecting in these places:

• Developed recreation sites, such as campgrounds and picnic areas
• Areas with active mining claims or other approved mineral operations
• Land where a private party owns the mineral rights

These federal BLM rules apply in both California and Arizona.

How do you check for mining claims?

On an unpatented mining claim, the land stays public but the claimant holds the rights to the minerals. BLM's mining claims packet adds that patented claims are private land, where you need the owner's permission to collect.

To check, use BLM's Mineral & Land Records System. It replaced the older LR2000 database and offers a research map. The BLM packet also suggests checking maps and claim records at a BLM field or state office.

How can you tell natural from stabilized turquoise?

Often you cannot by eye. Soft, porous turquoise is commonly pressure-treated with resin, which the USGS says improves its color, hardness and durability. A GIA study found lab methods such as UV fluorescence and infrared spectroscopy can identify resin filling, while noting some fillers are hard to detect.

Federal rules help buyers. Under the FTC's 16 CFR 23.24, sellers must disclose a gemstone treatment that is not permanent, needs special care, or significantly affects value. Ask the seller in writing, and use an independent gem lab for costly pieces.

How Pleasant Hill can help

Pleasant Hill Real Estate Group works in the High Desert and in Kingman. Thinking about land or a home in this mining country? You can search homes or request a free home valuation. Or reach Lana Stephens in Kingman or Dustin Bynum. You can also contact us with questions about land status before you buy.

General information, not legal, tax or lending advice. Rules, fees and rates change; confirm with the agency linked above or ask us. Pleasant Hill Real Estate Group · CA DRE Corp. #01997374 · AZ Entity Lic. #LC694532000 · Equal Housing Opportunity.