Wyoming State Gemstone Map of Wyoming That is Easy to Draw

Rockhounding in Wyoming is a great way to get out and enjoy the state's expansive landscapes and beautifully unique terrain. Wyoming happens to be among the best states in the entire country for rockhounding thanks to the sheer volume of prospective collecting sites and the impressive array of rocks and minerals to be found.

Wyoming is perhaps most well known for its world-class National Parks like Yellowstone and Grand Teton. While you can't collect rocks within those parks, the fantastically complicated and gorgeous geology found within their borders is a testament to the complex geological history of the area.

The relatively recent volcanic and metamorphic activity in Wyoming has given rise to many desirable and sought-after rocks and minerals, but it helps to have an idea of where to look and what to search for.

The best place to rockhound in Wyoming is Fremont County where you can find nephrite jade and Turritella agates in relative abundance. The gravels of streams and rivers like the Sweetwater and Wind Rivers are great places to search for rocks and minerals like quartz, agate, and petrified wood.

State Symbols
State Mineral
State Rock
State Gemstone Nephrite Jade
State Fossil Knightia
Source
Nephrite Jade
Nephrite Jade

This article will dive deeper into the many great rockhounding sites across the state (along with maps), but I'd like to highlight a few standouts here. Here are 10 of the best rockhounding sites for rocks and minerals in Wyoming:

  • Fremont County – Agate, Chalcedony, Jasper, Jade
  • Split Rock – Ruby, 'Sweetwater' Agate
  • Sweetwater County – Agate, Quartz crystals, Chert
  • Rock Springs – Silicified wood, Agate, Jasper
  • Box Elder Canyon – Geodes, quartz crystals
  • Wamsutter Agate Beds – Turritella agates
  • Kemmerer – Petrified wood, Agate, Chert, Jasper
  • Laramie Mountains – Agate, Chalcedony, Jasper
  • Lovell – Fossils, Dinosaur bones, Gastroliths
  • Sweetwater River – 'Sweetwater' Agates

Rocks and Minerals Found in Wyoming

If you're doing some rockhounding in Wyoming, you won't be lacking for rocks and minerals to find. Wyoming is home to a large array of rocks and minerals that will be of interest to the collector, some of which are fairly unique to the area.

Some of the more unique specimens you may be interested in are Turritella agates and nephrite jade which can both be found in relative abundance if you look in the right places. Many other varieties of agates, jasper, petrified and opalized wood are also very commonly found in gravels and washes all over the state.

If you're looking for gemstones and crystals, Wyoming is home to quite a few that will make good additions to your collection. Select locations – particularly the tailings of old mines – are prime spots for specimens of minerals like azurite, malachite, beryl, tourmaline, and garnet.

The most commonly found and collected rocks and minerals in Wyoming are:

  • Nephrite
  • Agate
  • Jasper
  • Azurite
  • Petrified wood
  • Malachite
  • Quartz crystals
  • Beryl
  • Tourmaline
  • Garnet
Petrified wood
Petrified wood

If you've already found a rock and you're not sure what it is, I would highly recommend checking out my Practical Rock Identification System. This bundle of information includes a book, videos, and online tools. It is, simply put, the most comprehensive and easy-to-understand rock identification system you'll find anywhere.

You can also read through my free rock identification guide and mineral identification guide which are filled with useful information and tools.

Rockhounding Sites in Wyoming

Important Disclaimer: I have not been to these locations myself, and I do not know if they are currently open for collecting. Use this resource as a guide to get you started. Follow posted signage and always get permission from the landowner to collect.

Through quite a bit of research and cross-referencing of available literature, I have compiled this list of some prospective locations in Wyoming which I would recommend to people looking to do some rockhounding. These are mostly comprised of old mining prospects, washes, streams, and historically known rock and mineral collecting sites. For additional reading, I'd highly recommend these books you can find on Amazon:

  • Rockhounding Wyoming
  • Gems, Minerals & Rocks of Wyoming
  • Roadside Geology of Wyoming
  • Northwest Treasure Hunter's Gem & Mineral Guide
  • Earth Treasures: The Northwestern Quadrant
  • Field Guide to Rocks and Minerals

Please remember that rock collecting locations are constantly changing. Specimens may become depleted from other collectors, the location may have been built on or altered, locality information in literature may be inaccurate, and property ownership may have changed hands. Joining up with a local rockhounding club for a group trip can often get you access to otherwise off-limits locations like privately owned mines and quarries. There are many rockhounding clubs in Wyoming so you can most likely find one you like nearby.

I have tried to take care not to list locations within National Park boundaries since collecting is illegal there, but please remember that it is up to you to make sure you have permission to collect wherever you are. There is plenty of BLM and National Forest land to collect on in Wyoming which is, in general, open for public use. Still, there may be privately owned mining claims inside those boundaries and you'll need to get permission to collect on that location.

Though there are many locations listed here, this list is far from exhaustive. A location's listing here is not a guarantee of accuracy. Be safe, never go underground, and make sure to get permission from the landowner to search for and collect specimens.

If you're planning on heading to the field, make sure you have all the gear you'll need! To get started, you can check out my recommended gear page which contains my full reviews for every Geologist's favorite rock hammer and the best hiking backpack I've ever owned.

Western Wyoming Rockhounding Sites

Western Wyoming is hard to beat if you're a rockhound. While much of the region is difficult to access, a large portion of the land is managed by the National Forest Service and is largely open to the public for collecting. This land is filled with hundreds of prospective rockhounding sites where you can find a nice variety of rocks and minerals including nephrite jade, azurite, quartz crystals, and unique varieties of agates.

Wyoming's state gemstone, nephrite, can primarily be found in Fremont County, particularly in the large area centered around the towns of Lander and Atlantic City. Stream gravels, washes, and draws all over this region will have the potential to contain nephrite jade as well as agates and petrified wood.

Location Rocks & Minerals
Red Gulch, in beds of red shales Gypsum
Greybull, area washes and draws btwn Big Horn River and Mountains Gastroliths, Petrified dinosaur bones, Fossils
Hyattville, area outcrops Gypsum, Dinosaur bones, Gastroliths, Fossils
Lovell, hogbacks for Little Sheep Mt. Gypsum, Fossils
Lovell, E to Big Horn Mountains in draws and washes Fossils, Ammonites, Dinosaur bones, Gastroliths
Big Horn River, near Montana border Concretions, Agate ('dry head' agate')
Sweetwater River, in gravels Agate
Fremont County, all regional washes and draws Agate, Chalcedony, Jasper
Copper Mountain, area mines to S Uranium minerals
Granite Mountains, area to NW Chalcedony
Atlantic City, area stream gravels, draws, etc. Agate, Chalcedony, Gold, Nephrite jade, Jade, Jasper, Muscovite, Quartz crystals, Agatized wood, Opalized wood, Tourmaline
Fort Washakie, area 10 mi. N Agate (moss agate), Chalcedony, Jasper
Green Mountain, S of Jeffrey City Agate (banded, moss), Aventurine, Garnet, Sapphire
Fremont County, washes and draws in extreme SE corner Agate ('Sweetwater agate'), Nephrite jade, Jade
Sweetwater, large area to SE of Lander Agate ('Sweetwater agate')
Wind River and tributaries, in gravels near Riverton Agate, Chalcedony, Jasper
Shoshoni, area pegmatite outcrops Aquamarine, Beryl, Feldspar crystals, Muscovite
South Pass City, area mines Gold
Split Rock Ruby
Warm Springs, area draws and hills over a large area Agate, Chalcedony, Jasper, Jade, Nephrite jade, Quartz crystals, Silicified wood
Cedar Mountain, E flank near Cody Travertine
Rattlesnake Mountain, area N of Shoshone River Anhydrite
Meeteetse, gravels of Greybull River Agate, Jasper
Kirwin Mine, SW of Meeteetse Azurite, Barite, Chalcopyrite, Cuprite, Galena, Gold, Limonite, Malachite, Pyrite, Quartz crystals, Sphalerite, etc.
Sweetwater County, all area outcrops of Green River formation Agate, Chalcedony, Chert, Jasper, Petrified wood, Silicified wood, Quartz crystals, Agate ('Turritella' agate)
Eden Valley, area washes and draws Silicified wood
Farson, gravels of Big Sandy River Agate, Chalcedony, Chert, Jasper, Quartz crystals, Silicified wood
Granger, in gravels near buttes to S Agate ('Turritella' agate)
Green River, washes and draws to W Agate, Chalcedony, Jasper, Silicified wood
Red Desert Agate, Chalcedony, Chert, Jasper, Quartz crystals, Silicified wood
Rock Springs, washes and draws over large area to E Agate, Chalcedony, Chert, Jasper, Quartz crystals, Silicified wood
Steamboat Mountain, general area Agate, Chalcedony, Jasper, Petrified wood
Bitter Creek, SW of Wamsutter Stechemigite
Wamsutter, area to S in agate beds Agate ('Turritella' agate)
Thorofare Wilderness, in stream gravels Agate, Jasper, Opalized wood, Silicified wood
Blacks Fork Creek, NE corner of Uinta County Silicified algae, Agate ('Turritella' agate), Chalcedony, Jasper, Quartz crystals, Petrified wood
Fort Bridger, area gravels, streams, washes, etc. Agate, Jasper, Silicified agate
Ten Sleep, in exposures to NW Gypsum
Worland, area washes and draws Agate, Chalcedony, Jasper (red, yellow), Quartzite
Kemmerer, all washes and draws over a large area Agate ('Turritella agate'), Chalcedony, Chert, Jasper, Quartz crystals, Petrified wood, Silicified wood
Owl Creek, in placers SE of Washakie Needles Gold
Lander, area surface over a very large region Agate, Jasper, Nephrite
Thermopolis, mines in area to SW Copper minerals, Limonite
Thermopolis, in bluffs to W Selenite crystals, Travertine

Eastern Wyoming Rockhounding Sites

Rockhounding in eastern Wyoming offers a lot of opportunities to find a wide variety of rocks and minerals. Most of the collectible material in the area is in the quartz family. Cryptocrystalline quartz varieties like agate, jasper, chalcedony, and petrified wood are prevalent over much of the region.

The entire region boasts many outcrops of bentonites, which are ash clay layers left over from ancient volcanic activity. You can also find quite a few more interesting minerals like amazonite, tourmaline, and beryl in the tailings of old mines scattered across the hills and mountain ranges.

Location Rocks & Minerals
Sportman Lake, prospect 1 mi. E Gypsum
Como Ridge, N of US 30 Petrified dinosaur bones
Rambler Mine, near Holmes Campground Barite, Loranite, Orpiment, Realgar
Grand Encampment, many area mines Azurite, Malachite
Jelm Mountain, S side area mines Bismutite, Bismuth
Laramie, outcrops 5 mi. to NE Gypsum
Laramie Mountains, draws and washes of eastern slopes Agate, Chalcedony, Jasper
Red Buttes, deposit in area to S Gypsum
Seminoe Reservoir, all area draws and washes Jade
Baggs, area mines to W Coffinite, Ilsemannite, Autunite, Pyrite, Uranophane, Uraninite
Creede Mine, near Encampment Cobaltite, Erythrite, Linnaeit, Pyrrhotite
Sierra Madre, area mines Copper minerals, Cobalt minerals
Shirley Basin, N of Medicine Bow Opalized wood
Saratoga, area draws and washes N to Walcott Opalized wood
Converse County, many area mines in SW Copper minerals, Chalcopyrite, etc.
Deer Creek Canyon Mine Chromite
Box Elder Canyon, near Glenrock Geodes (chalcedony), Quartz crystals
Moss Agate Hill, near Douglas Agate (moss agate), Chalcedony, Jasper
Warren Peak, area mines Azurite, Malachite
Copper Prince Mine Chrysocolla, Gold, Malachite
Black Hills National Forest, area mines Fluorite, Gold
Jay Em, area draws and washes Agate, Malachite, Onyx
Buffalo, area to NE along US 16 Agate, Chalcedony, Gastroliths, Jasper, Petrified wood, Quartz crystals
Crazy Woman Creek, general area E of Buffalo Opalized wood, Silicified wood
Copper King Mine Barite, Copper minerals
Chugwater Creek, in gravels Bloodstone
Sage Hen Creek, in gravels Agate, Chalcedony, Jasper
Sweetwater River, area E of Split Rock Agate ('Sweetwater agate')
Casper, area quarries Agate, Alabaster, Amazonite
Casper, pegmatite outcrops to S Beryl, Muscovite, Tourmaline
Poison Spider Creek, area washes and draws Agate, Chalcedony, Jasper
Hartville, area washes and draws to W Agate (seam, moss), Chalcedony
Rawhide Buttes, area mines Azurite, Bornite, Chalcocite, Chrysocolla, Malachite
Sunrise, area mines Arsenopyrite, Barite, Copper minerals
Cooney Hills, near Wheatland Garnet
Wheatland, area to SW Moonstone, Labradorite
Newcastle, area deposits to E Gypsum

Where to Find Geodes in Wyoming

Geode
Geode

Everyone enjoys the prospect of finding their very own geodes out in the wild, and it's easy to see why. Cracking them open reminds me of opening a Kinder-Egg with a surprise toy inside. You never know what type of crystals or patterns you're going to find inside and it makes them incredibly exciting.

Despite the otherwise impressive rockhounding in Wyoming, geodes are a fairly rare occurrence in the state. Still, if you know where to look you may be able to find one for your collection. Most of the geodes in Wyoming tend to be lined with chalcedony, and more rarely with microcrystalline quartz.

The best place to find geodes in Wyoming is in Box Elder Canyon near the town of Glenrock. They are most commonly found in gravels and the clays lining nearby streams. Geodes can also reportedly be found in gravels in the southern reaches of the Absaroka mountain range.

Tip: Not sure if the rock you've found is a geode? Check out my article about how to identify a geode.

Where to Find Agates in Wyoming

Turritella Agate
Turritella Agate

I love finding agates because you never know what sort of beautiful patterns and colors they might contain. They are some of the most popular rocks to tumble, and it's easy to see why with their intricate banding and unique designs.

Agates also happen to be some of the most commonly collected rocks in the United States, including Wyoming. In fact, Wyoming is home to a unique variety of agate called 'Turritella agate' that is extremely popular with local collectors. You can also find other types of agates like moss agate and 'Sweetwater agate', another variety that is unique to the state of Wyoming.

If you're looking to start collecting rocks in Wyoming, agates are a great place to start. They are widespread and fairly easy to find if you have a general idea of where to look.

In general, the best places to find agates in Wyoming are in gravels and washes, particularly in Sweetwater County, Fremont County, and along the Sweetwater and Wind Rivers. Turritella agates are most commonly found in southwest Wyoming, especially near the town of Granger.

Where to Find Crystals and Gemstones in Wyoming

There is nothing quite like uncovering a quartz crystal with a perfect termination or finding a beautiful agate that has been waiting in a river bank for you to come along and take it home. Gemstones are some of the most enjoyable specimens that rockhounds can find, but it's not always easy to know where to look.

Tip: Check out my Complete Rock Tumbling Guide to make your rocks and gemstones really shine!

Luckily, Wyoming is a prime spot for hunting your own crystals and gemstones. The many mountain ranges and associated volcanic activity throughout the state have created a perfect geologic environment for the creation of many interesting gemstones that you can now find in countless locations across the region.

Aquamarine
Aquamarine

In general, the best places to find crystals and gemstones in Wyoming are washes and draws across the western half of the state, particularly near Kemmerer, Atlantic City, and Rock Springs. Quartz crystals can also be found northeast of Buffalo and in Box Elder Canyon.

The most commonly found gems and crystals in Wyoming are quartz and feldspar, but you can also find many others including garnet, tourmaline, and opal. And of course, nephrite jade can be found in such abundance that it is Wyoming's state gemstone.

Wyoming Rockhounding Laws & Regulations

One of the most common questions rockhounds have is whether or not they are allowed to collect at a certain location. It is the responsibility of each rockhound to obtain permission from a landowner to search and/or collect on a piece of property.

The ownership and status of land can and does change frequently, making it impossible to document accurate information for every location on this page. However, I have compiled a list of resources here so that you may investigate and obtain permission for any locations (found here or elsewhere) for yourself.

Public Land Resources

I have written entire articles which cover the rockhounding laws and regulations for nearly every type of public land you can think of. I encourage you to check them out if you are curious about the legalities of rock and mineral collecting.

  • Rockhounding on Public Land: Laws and Regulations
  • Can You Collect Rocks in State Parks? All 50 States Answered

To determine what type of public land a particular location is on, I would recommend starting with the Wyoming Game & Fish Department's Public Access Summary.

Private Land Resources

As with most states, each county in Wyoming will have records of who owns each piece of property. You can also usually get the landowner's name and address by visiting the county records office. I would probably start by contacting the assessor in whatever county you're interested in and getting whatever contact information you can for the landowner.

Sources & Further Reading

The locations and information contained in this article are primarily derived from academic papers, online resources, and other outside sources. If you would like to read some of the source material for yourself I have listed them below. The majority of these locations are my interpretation of Robert Beste's A Location Guide for Rock Hounds in the United States. Other sources include:

  • mindat.com
  • Wyoming Game & Fish Department
  • Wyoming State Geological Survey
  • Mines and Minerals Map of Wyoming
  • Wyoming State Mineral and Gem Society

santanaaran1991.blogspot.com

Source: https://rockhoundresource.com/wyoming-rockhounding-location-guide-map/

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