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Geodes
Use this page to keep an informational log specific to this treasure: The more detailed the inforamtion, the more helpful it will be to other hunters. Click EasyEdit to add what you know. Read about "thunder eggs" on the Cash and Treasures main siteGeneral information on geodes
A Geode is simply a rock with a cavity lined with minerals. The most common types of minerals found in Geodes are quartz and calcite but other mineral species can be found; such as celestite, chalcedony,pyrite, gypsum barite,hematite and many others. Geodes are formed in both sedimentary and igneous rocks, Cavities in the host rock are slowly lined with minerals that seep into the cavity dissolved in rain water. Typically the source of silica for the quartz crystal lining is volcanic ash fall. If the cavity is completely filled with minerals it is no longer a Geode but a Nodule. Geodes can be found in many locations throughout the country wherever limestone rock or rocks of volcanic origen are found.
Where to find it:
What areas of the world are famous for this treasure? If you have first-hand experience with a spot where other treasure hunters can go, enter info here:| GPS Coordinates, if known: Town/region: Hancock County State, country: IL Tips for finding it: | GPS Coordinates, if known: Town/region: State, country: Tips for finding it: |
| GPS Coordinates, if known: Town/region: Keokuk State, country: Iowa Tips for finding it: Within a 35 mile radius of Keokuk is one of the nation's hottest spots for collecting Geodes. Search the streams, fields, and road cuts in the area. You will find Geodes. Over 30 minerals can be found in the centers, although most of the centers are quartz and calcite. | GPS Coordinates, if known: Town/region: State, country: Tips for finding it: |
Tools needed: Shovel, bucket, hand pick, gloves, hat
Special skills needed: Do not break the geodes with a hammer, they can be easily rendered valueless.
Check the weight of a geodes against each other. The lighter geodes are more than likely hollow.
Identification tips: The Keokuk Geodes have a cauliflower appearance to them. This is true with many sedimentary Geodes. Igneous geodes are generally rounder in appearance.
Additional helpful resources:
[include links to websites, book titles, maps, clubs]
Please check out the Iowa National Directory for more information. Also visit the Oregon National Directory for Geodes, (Thunder Eggs)
Recommend a guide:
[If you need a guide, list them here with phone/email and website URL]
Recommend an appraiser:
aubreyreynolds9@gmai |
Latest page update: made by aubreyreynolds9@gmai
, Aug 9 2008, 8:08 PM EDT
(about this update
About This Update
Edited by aubreyreynolds9@gmai
1 image added view changes - complete history) |
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Keyword tags:
Geode
geodes
hunting for treasure
thunder eggs
treasure
types of treasure
where to find treasure
More Info: links to this page
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| Started By | Thread Subject | Replies | Last Post | ||
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| SecretNinja | Identifying potential Thunderegg (and other treasure) localities | 6 | Sep 14 2009, 9:18 PM EDT by SecretNinja | ||
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Thread started: Sep 14 2009, 4:20 PM EDT
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Hi All,
I trip (literally! I have the sore ankles to prove it!) around the more remote and forsaken parts of Oregon and Washington quite a bit. What do you all look for (tells) that a locality near you might have something interesting? During the wandering process I have discovered a massive amount of fossils, crystals, agates and pertified wood, however I am completely naive to the proess of locating something which may have to be excavated. I know there are rules about digging pertaining to the specific land you intend to dig on but, what do you look for at your favorite sies/roadcuts? I have been reading about the relationship between perlite and thundereggs, and I have not quite been able to wrap my brain around what I am looking for. I found a baseball sized round nodule (I have not cut it in half so I have no clue what it contains) in a loose popcorny rhyolite ashbed I was working for crystals and fossils and I didn't think thundereggs occured in that particular locality (20 or so miles outside Antelope). I've been to Richardsons and have dug eggs there but that's it. Do all beds look similar and have the same composition? What do you watch for in roadcuts? What is your favorite rock to hunt?
Do you find this valuable?
Keyword tags:
Oregon
Rockhounding
Thundereggs
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