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THUNDEREGGS AND GEODE SPECIMENS

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This page contains geodes and thundereggs, both polished and unpolished, from a variety of places, as noted in the descriptions. We charge one shipping cost for all that will safely fit in the box and will ship to the U.S. as well as Internationally. For International orders, there may be an additional shipping cost. If your order requires additional shipping, we will either contact you before we ship, or you can email us for an invoice. Thanks!


Fort Irwin Slab

Rare Unpolished Fort Irwin Transitional Nodule Slab

Fort Irwin Slab

Click image for slide show

[2] [3] [4] [5] [6] [7] [8] [9] [10] [11]

This is an unpolished slab cut from a Fort Irwin Transitional nodule, from the Mojave Desert of Southern California. To our knowledge, the material is rare. We did not slice this one, it came to us this way, through an old collection. It is 6" x 3" at its widest points, and 6-7 mm thick. It weighs 138.3 grams, or 4.8 ounces. It looks like a complete slice of the rock. We know that, for a thunderegg collector, a complete half is desired, but this is a beautiful slice of a rare material. Note that it was photographed wet in all photos except the last two.

U.S. shipping cost: $6.80

Fort Irwin Slab   Item# 3405   Price: $15.00  


Oco Geode

Small Oco Geode with Agate and Crystals

Oco Geode

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[2] [3] [4] [5] [6] [7] [8] [9]

This is one half of a small, polished Oco Geode nodule, a natural stone from Brazil filled with Agate and Quartz. The centers are full of crystals, some larger, some smaller, surrounded by agate. Each piece is unique, no two are exactly alike. They come in amazing variety as you can get an idea of from the photos. You will not necessarily receive one of those you see in the slide show, but these are good representations, similar to what one could receive.

Each one has been polished on the face, bringing out the natural beauty of the agate. Sizes vary, mostly between 1-2" long x 3/4-1" wide and 1-2" thick. But as each piece is one of a kind, you could receive one a little smaller or larger. The weight of each one can be less than an ounce or up to about 2 ounces. If you receive one you are not happy with, just send us a message and we will help ensure you are completely satisfied with your transaction.

Whether one is a collector or lover of rocks and gems, minerals, or crystals, these little stones are awesome for delicate accents in the home or office, or on a shelf for display.

U.S. shipping cost: $3.50 First Class

Oco Geode   Item# 4032   Price: $9.95  

Available through Amazon, or
contact us for a hand-picked stone, by direct invoice.


Baker Agate

Polished Baker Ranch Agate with Charcoal-Looking Crystals

Baker Agate

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[2] [3] [4] [5] [6] [7] [8]

This is a large Baker Ranch Thunderegg. The center crystals have a darker look to them - as if they are charcoal-colored, surrounding an area of grey and white fortification. It's heavier than the others, weighing 1 lb, 13.5 ounces, or 835 grams. It measures roughly 5" x 3" and about 2 1/2" thick. (The mate to this side is available as well if interested.)

U.S. shipping cost: $6.80

Baker Agate   Item: 3824   Price: $35.00  


Opal Mtn Thunderegg

Unpolished Opal Mountain Thunderegg

This is another rare Opal Mountain thunderegg. This one is about 5" x 4 1/2", and up to 1 1/2" thick. It weighs 1 lb, 2.28 ozs, or 530 grams. The last photo of the slide show includes the other half, which is below. It is not part of this listing.

U.S. shipping cost: $6.80

Opal Mtn Thunderegg   Item# 3691   Price: $10.00  


Opal Mtn Thunderegg

Unpolished Opal Mountain Thunderegg - the Mate to #3691

This Opal Mountain thunderegg is the mate to the one above, #3691. It is about 5" x 4 1/2", and about 1" thick. It weighs 15.8 ozs, or 445 grams. The last photo of the slide show includes the other half (above). It is not part of this listing.

U.S. shipping cost: $6.80

Opal Mtn Thunderegg   Item# 3692   Price: $10.00  


Opal Mtn Thunderegg

Unpolished Opal Mountain Thunderegg

This is an Opal Mountain thunderegg. It is about 3" x 3" and 28 mm thick. It weighs 8.5 ounces, or 240 grams. The last photo of the slide show includes the other half. It is not part of this listing, but may still be available if you are interested in that side only (or both).

U.S. shipping cost: $6.80

Opal Mtn Thunderegg   Item# 2393   Price: $4.00  


Opal Mtn Thunderegg

Unpolished Opal Mountain Thunderegg with Small Waterline Area

Opal Mtn Thunderegg

Click image for slide show

[2] [3] [4] [5] [6]

This is another rare thunderegg from Opal Mountain, in the Mojave Desert of California. It is just the natural rock, sliced and unpolished. This was a thin nodule, sliced through, revealing a small area of waterlines. It is roughly 4" x 3" and only as thick as about 21 mm. It weighs 260 grams, or 9.2 ounces. (The mate to this one is available if interested, though not shown.)

U.S. shipping cost: $6.80

Opal Mtn Thunderegg   Item# 2388   Price: $5.00  


Mexican Snowball Agate

Polished, Domed Mexican Snowball Agate

We had this one marked as a Laguna Agate nodule, and then we thought it might actually be a Coyamito Agate, though neither quite looked as we thought they should. HOWEVER, since that point we've learned more and more, and I just noticed the back on this one. Judging from the matrix, I'm pretty sure it is actually a Mexican Snowball Agate. (No photos of the back right now, but will take some soon, or upon request if you don't see the back before I get to it!) Our understanding is that Snowballs may be weathered agate cores of fully expanded thundereggs. Please note that it is domed on the surface, the rough nodule on the back. It is approximately 1 1/2" x 1 3/4" and is between 9-19 mm in thickness. It weighs 28 grams, just less than an ounce.

U.S. shipping cost: $5.50

Mexican Snowball Agate   Item: 3086   Price: $18.00  


Black Agate Thunderegg

Polished Thunderegg with Black Agate

Black Agate Thunderegg

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[2] [3] [4] [5] [6] [7]

This is a pretty little thunderegg. Unfortunately we're not sure of the locality on this one. My first guess would be Black Rock Desert, or maybe from the Black Agate Mine area of Wiley's Well? Kind of a brick red matrix with clear and black agate, and a very small area of waterlines. It is about 1 3/4" x 2" and 14 mm thick. It weighs 53.4 grams, or 1.8 ounces.

U.S. shipping cost: $6.80

Black Agate Thunderegg   Item# 2742   Price: $6.00  


Amethyst Thunderegg

Polished Wileys Well Thunderegg with Amethyst Crystals

This is a thunderegg (a geode) with a small pocket of light amethyst. I believe it is from the Wileys Well area, but I'm not certain and don't know which bed if so. Lots going on in this one. It's polished on the face, but notice in one of the photos, you can see a small edge that didn't polish like the rest. I didn't notice it until I saw the photo. It is about 2 5/8" x 2 5/8" and 61 mm thick. It weighs 370 grams, or 13.1 ounces.

U.S. shipping cost: $5.50

Amethyst Thunderegg   Item: 2740   Price: $12.00  


Oregon Thunderegg

Unpolished Oregon Thunderegg with Common Opal & Dendrites

This is another thunderegg with some common opal in it, but it also has awesome little dendrites as well. It is not polished at all. It is another of the numerous miscellaneous sliced pieces from any of the various collections we've acquired. We believe it is from Oregon, Richardson's Ranch, probably Blue Bed. It is 3 3/4" x 2 1/2" and 22-23 mm thick. It weighs 217.9 grams, or 7.6 ounces

U.S. shipping cost: $6.80

Oregon Thunderegg   Item# 2368   Price: $7.00  


Richardson's Ranch Thunderegg

Unpolished Richardson's Ranch Thunderegg

This is a very neat unpolished Thunderegg, we think from Richardson's Rock Ranch. It is roughly 3 1/2" x 3" and about 2 1/2" thick. It weighs 600 grams, or 1 lb, 5 ozs. It is not polished, but it has had a bit of sanding already. Beautiful, colorful patterns in this one, but please note that in natural lighting, it is not as bright as it looks in the photos. Additionally, it was photographed wet in most of the photos.

U.S. shipping cost: $6.80

Richardson's Ranch Thunderegg   Item# 1771   Price: $5.00  


Polished Wileys Well Nodule

Wiley's Well Thunderegg with Neat Inclusions

This is a Thunderegg from Wiley's Well area, polished on the face. It's filled with crystals and agate, with a flat, solid face. You'll easily notice the 'rabbit ears' about the center, but there are several other inclusions that look like they'be been kind of 'stuck' near the 'ears.' It's 3 1/2" x 2 1/4" and about 1 1/2" thick. It weighs 280 grams, or 10 ounces. A beautiful piece to add to any collection!

U.S. shipping cost: $5.50

Polished Wileys Well Nodule   Item: 1221   Price: $10.00  


Hwy 46 Thunderegg

Thunderegg from Hwy 46 Near Cambria

Hwy 46 Thunderegg

Click image for slide show

This is a thunderegg collected near Cambria, California, off of Highway 46. It has already sold, but we may have another, similar. If interested, contact us and we will add it to our priority list to photograph and put up.

U.S. shipping cost: $6.80

Hwy 46 Thunderegg   Item# 2421   Price: $old  

Sold - - Contact us for additional items.


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