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VISIT OUR NEW GEOLOGIC TIMES CORPORATION (d.b.a. Mobile Mining Experience & GTC Rock Shop)  WEBSITE: . We plan to take this site (the old Mobile Mining Experience website) down in the coming weeks and the old domain will be linked to the new website. Thank you for your continued support and patience!


Geode Cracking / Basic Geology Programs:











GCBG geode cracking

There is just something special about cracking open one of these rather ordinary rocks and discovering the hidden treasures inside. You will be amazed at all the different crystals and other minerals that can be found inside!…These Geodes took millions of years to become what they are today and you could be the first to see whatCracked geodes nature created inside. We think that’s pretty cool!  Basically, you never know what you might find inside. Well, at least not until you crack it open to see. That process is safe and easy thanks to our custom made geode cracking machines. So, what are you waiting for? Let's get cracking!

Why not take advantage of a number of pre-designed and customizable geode cracking programs or activities for your next event.

MME STEM LogoMany of our programs, including our geode cracking programs,  are perfect for and are increasingly being utilized in STEM (Science, Technology, Engineering, and Math) program efforts by public & privates schools, summer camps, and many others. Please let us know what your particular needs and goals are and the budget you have to work with. Our staff will work with you to recommend an existing program we offer or take steps to customize the program to meet and exceed your goals

Geode Cracking "Activity Only" Programs:

Young boy with his geode

Looking for a great activity that is both fun & educational for your community & company picnics, family reunions, youth groups, summer camps, festivals, fairs, shows, etc. Why not consider one of our Geode Cracking "Activity Only" programs. Yes, we say its just an activity. However, everything we do includes an educational element. Learn more...


Educational Geode Cracking Programs: Popular STEM program choice with schools..

MME geode cracking 2The Mobile Mining Experience (MME) Geode Cracking Program combines formal presentation and hands-on activities to introduce participants to geology in a fun, safe and interactive way.  Knowledgeable and friendly MME staff provides a respectful environment where participants can openly share their thoughts and ask questions. Pictures, banners, geode specimens, mineral specimens and other learning aids are used to reinforce material covered and frequent learning checks (with prizes for those that raise their hands and correctly answer questions) ensure participants stay engaged throughout the program.   Learn more...
Great For STEM! (and STEAM)


 Geode Cracking Program Itinerary:

Typical Itinerary:

1.      Introduction MME staff introductions and quick program overview

2.      Presentation Short, focused, interactive dialogue exploring the following questions:

3.       Safety Rule Review Before moving to the hands-on portion of the program, all participants must agree to follow are simple safety rules:

Safety first and always!: If for any reason Mobile Mining Experience staff deems conditions to be unsafe, we reserve the right to shut things down with little or no warning until such time conditions change to permit safe operations to resume. This includes, but is not limited to equipment malfunctions, behavioral issues and/or unsafe practices by participants.


4.      Hands-on activity – Let’s get cracking! Each participant cracks and keeps a geode. Throughout this portion of the program, we continue to ask questions and award small prizes to keep everyone involved. Process:

If participants are cracking multiple types of geodes, we simply repeat the process until complete.

5.      Fluorescent Mineral Demonstration (Optional & time permitting): Short fluorescent mineral demonstration showing the vivid greens and sometimes even reds, blues and orange colors that appear when many geodes are exposed to short wave, mid wave and long wave ultraviolet lights.

6.       Questions for prizes! During the presentation, we will stop occasionally to ask the participants a question involving material reviewed. The first one to raise their hand and answer the question correctly will win a mineral or fossil prize. These questions for prizes reengages the participants, reinforces things learned, and allows MME staff a pause to evaluate if and what changes in the presentation are warranted. We recognize that every class / session will different and we do our best to adjust our program accordingly. Yes, it is harder to manage and run a program this way, but the results are well worth it!

For school programs, there is a two part round of questions at the end of the presentation and geode cracking activity. The students will work together to answer the first question. If (when) they get it right, then the second question goes to the teacher. If (when) the teacher gets it right, the entire class (and teacher) wins a mineral or fossil prize.


7.       Wrap-up and Final Questions (Time permitting) Participant geodes, as well as, geode and mineral specimens from our collection are used to review key points. Any final questions are answered and the group is released.


 Service Area:

Service Area  The real limiting factor is not so much how far we are willing to travel, but at what point is it no longer cost effective to do so. The larger the event or program, or the more events or programs we can book at or near a particular location, the further we can travel reasonably. Click on the "service area" link button to learn more...


Geode options for program & activties:

We currently offer eight different types of geodes and in multiple sizes of each that can be used in our geode cracking sales, activities, and programs. That's about 26 combined type and size options to choose from. Plus, we occasionally have limited quantities of  what we call "guest geode types" from time to time


Types of geodes Mobile Mining Experience uses in our programs
whole geodes Cracked / open geodes Geode description
Trancas geodes_whole Trancas Geode_split

Trancas Geodes:  They have a very diverse crystal structure and mineral content making them ideal for educational purposes.  Plus, these have a extremely high percentage of hollow geodes in small sizes that is sure to please and helps keeps program costs down. They are surface mined at the Tranca Mine in Chihuahua, Mexico. Tranca geodes are relatively young and are estimated to be only around 11 millions years old and average 1 to 5” in size, but larger ones are found.


Choyas Geodes_whole Choyas geodes_split


Las Choyas Geodes: Las Choyas geodes are a very popular geode type of collectors worldwide for more than 40 years now because of the extremely diverse mineral and crystal content.  They are about 44 million years old and average about 1-5 inches in size, but much larger geodes are sometimes found. These are mined at the Las Choyas mine in depths up to 200’ or more deep in Chihuahua, Mexico.

Bravo Gedoes_whole Bravo Geodes_split

Bravo Geodes: Often will contain mud that you may or may not be able to wash out to reveal the quartz and calcite crystals hidden inside that sometimes gets a blue green hue. They are surface mined near Chihuahua, Mexico.

Occasionally, amethyst has be found…

Crystal Canyon geodes _ whole Crystal Canyon Geodes _ split

Crystal Canyon Geodes: Also known as Candy Apple Geodes, Crystal Canyon geodes often feature some sharp crystal points and rods making this a very popular geode type. However, the shell of this geode can vary in hardness and thickness which can negatively affect the results when cracking (crushed sections are possible). Crystal Canyon geodes are mined in the Copper Canyon area of Chihuahua, Mexico. Age is unknown...

Keokuk Geodes_whole Keokuk geodes_split

KeoKuk Geodes: This is one of only a few geode types we secure from US mines, and at over 250 million years old, clearly the oldest of all the geodes we crack. They average about 2-4 inches in size, but much larger geodes are sometimes found. The vast majority of the Keokuk Geodes are found within a 50 or so mile radius of Keokuk, Iowa

Dugway geodes whole Dugway Geodes split

 Dugway Geodes: Classified as a thunderegg by some, Dugway geodes come from Dugway, Utah. They feature a rhyolite and agate shell and sometimes have multiple hollow chambers. They typically range 1 to 4” in size, but larger geodes are found.

picture coming soon! Moroccan geodes split

Moroccan Geodes: This is a very popular geode type. It features sugary white quartz crystals that reflect light well. They are mined in Morocco, and are estimated to be around 34 million years old. They average 1 to 6” in size, but larger ones are found

Sweet Potato Geodes
picture coming soon!
Sweet Potato Geodes
picture coming soon!
Very unique geode that truly looks like a sweet potato. Features small chambers and sometime multiple champers lined with agate and fine quartz crystals . Due to a high number of nodules to hollows, we do not guarantee hollow geodes and do not recommend this geode for programs

Coming soon!
New Geode Types
Coming soon!
New Geode Types
Coming soon! We will be adding several new geode types soon...



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