Flat on bottom

firehorse12 · Sep 23, 2012

What kind of rock is this? Crinkly and bumpy and round but very flat on the bottom.

Flat on bottom as shown here

StoneWhisper · Sep 24, 2012

There isn't a doubt in my mind that you have a Thunder Egg.. I say this because I've seen nearly 200 of these in my Aunts back yard in TN.. A thunder egg is typically made up of Chalcedony/agate/quartz.. In yoru case those elements would be on the inside.. The outside apperas to be made up Limestone.. However, There is a slight chance this could be a geode instead of a thunder egg.. I waited neadly 6 years tio have one of mine open.. and gave half to a user here. If you have the ablity to have it cut, then do so.. If not You still have a great find called a thunder egg.

firehorse12 · Sep 27, 2012

That's pretty cool - thanks for looking and I will see about getting it cut open

I like the name. Wonder how they got their name?

StoneWhisper · Sep 29, 2012

Not sure the full story of "thunder Egg" however, In my case. My aunt lives in a lime stone out cropping that tends to attract day tiem lighting strikes.. Don't belive it?.. I've seen it.. Bright sunny day.. and out of no where lighting hits a few of the lime stoens jutting up out of the ground.. Running down intot he field.. Charded bits of lime stone all over the place.. these mini burst would uncover stoens very simular to what you have.. With this in mind, I feel the "Thunder Egg" name fits..

firehorse12 · Sep 29, 2012

Pretty cool 8-)

I'd be careful when walking around out there, eh? Wow.

marinedad · Sep 29, 2012

thunderegg, geode, and a possibility of coprolite=dino poop. most of the coprolite i have, did have a flat spot on one side. after slicing, the colors can vary greatly.

firehorse12 · Sep 29, 2012

Lovely - dino poop :laughing9:

Leave it to me to find dino poop.

Bajahunter · Sep 29, 2012

Fossilized or petrified dino-poop is worth a whole lot more than a thunder egg.

firehorse12 · Sep 29, 2012

Bajahunter said:
Fossilized or petrified dino-poop is worth a whole lot more than a thunder egg.

either way or if its nothing at all it was fun finding it! However, I wouldn't mind finding a big green emerald or pot of gold next - how about you?

Bajahunter · Sep 29, 2012

Gold mines are so passe.
A guy named Carlos owns one of the biggest gold mines in the world about 50 miles north of where I live and the ore is really ugly.
I am looking for that special kimberlite pipe.
Either that or the lost treasure of the Jesuits.
Until then I'll just have fun wandering aimlessly through the desert.

PYRATE · Sep 29, 2012

Crinkly and round and flat on the bottom?

Only one thing it could be: an ancient fossilized bisquit

firehorse12 · Sep 30, 2012

Bajahunter said:
Gold mines are so passe.
A guy named Carlos owns one of the biggest gold mines in the world about 50 miles north of where I live and the ore is really ugly.
I am looking for that special kimberlite pipe.
Either that or the lost treasure of the Jesuits.
Until then I'll just have fun wandering aimlessly through the desert.

sounds great and you will have a wonderful journey I'm sure! Happy hunting!!

firehorse12 · Sep 30, 2012

PYRATE said:
Crinkly and round and flat on the bottom?

Only one thing it could be: an ancient fossilized bisquit

But of course! I'll go with that!

StoneWhisper · Oct 1, 2012

Just announced.. My wife placed her over night bag in the middle of the living room floor.. so what does this mean?.. shes ready for a trip.. and of course "Thunder Ridge" (Aunts Home in TN) will be just one of the destionations.. Thou I wish I could invite any and all of you to Thunder Ridge.. Saddly I can't.. However.. I can Invite you on another outing I'll post in another area..

firehorse12 · Oct 1, 2012

WizardofTheStone said:
Just announced.. My wife placed her over night bag in the middle of the living room floor.. so what does this mean?.. shes ready for a trip.. and of course "Thunder Ridge" (Aunts Home in TN) will be just one of the destionations.. Thou I wish I could invite any and all of you to Thunder Ridge.. Saddly I can't.. However.. I can Invite you on another outing I'll post in another area..

Happy hunting! Post some pics

rock · Oct 7, 2012

If you have a mineral museum near you take to them. Sometimes they will buy things from you if they are good examples. And will put your name on a plate in their show cases. Just a thought

austin · Oct 8, 2012

Is your big rock light, as in lighter in weight than you would expect? If so, I THINK it is a calcite geode. They occur in a couple areas of Texas, 45 miles north of San Antonio and near you, both in a narrow younger formation. Thunder egg, I think that they contain quartz, agate, stuff like that. There is none around you. Might be limestone concretion if it is really heavy. Cool find anyway. Depends where you found it. You can just take a geology hammer and open it to find out. I have found them before, but none that big. It is really nice.

firehorse12 · Oct 8, 2012

It is pretty heavy. I have two of them actually. Geology hammer? I will try and find one - thanks! And thanks also to you, Rock, I will find out about mineral museum or something similar. Suzy

StoneWhisper · Oct 9, 2012

Yes same here, Donating to museums or even nature centers can be very rewarding.. thats how I got my start.. I was asked to help clean up a nature path when I discovered Tourmalated quartz.. and of course most of the finds when to the nature center while I did walk away with a few smaples myself.