rebeccaink
starting to spend too much on rocks
Member since May 2017
Posts: 190
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Post by rebeccaink on May 26, 2017 10:37:01 GMT -5
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Deleted
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Member since January 1970
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Post by Deleted on May 26, 2017 12:34:10 GMT -5
Difficult to be certain about the first photo just from a picture. Thundereggs have rhyolite shells, and the shells can vary in outward appearance, depending on the origin. That box contains SOME thundereggs, but not sure about all of them.
The second and following photos all look like Priday thundereggs (though likely not the orange ball in the upper-left in the second photo).
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Post by fernwood on May 26, 2017 13:51:47 GMT -5
Maybe??? Do they appear light in weight for size? That could indicate hollow interior, which would make them thundereggs. Even if not light, they might be. Only way to tell for sure is to saw them in half. Agree the orange one is probably not.
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rebeccaink
starting to spend too much on rocks
Member since May 2017
Posts: 190
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Post by rebeccaink on May 26, 2017 14:16:26 GMT -5
Maybe??? Do they appear light in weight for size? That could indicate hollow interior, which would make them thundereggs. Even if not light, they might be. Only way to tell for sure is to saw them in half. Agree the orange one is probably not. I thought hollow inside made them geodes? I have a lot to learn! I can't cut them but I did bust a few open and it appears to be either agate or jasper inside. The lighter color ones have been crystallized inside.
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,681
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Post by Fossilman on May 26, 2017 16:12:02 GMT -5
Yes they are all thundereggs.... Nice ones too.............I see a few doubles and quads too-SWEET!
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,681
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Post by Fossilman on May 26, 2017 16:14:39 GMT -5
Some thundereggs are hollow,like Geodes,but still are thundereggs.....Geodes are hollow,some solid,but can't be a thunderegg....
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Post by melhill1659 on May 26, 2017 16:15:39 GMT -5
Thundereggs: , , Geodes: , , ,
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rebeccaink
starting to spend too much on rocks
Member since May 2017
Posts: 190
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Post by rebeccaink on May 26, 2017 16:44:56 GMT -5
Thundereggs: , , Geodes: , , , Wow! Those are beautiful! Thundereggs are like a 🎁 just waiting to be opened!
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Post by coloradocliff on May 26, 2017 19:22:21 GMT -5
Thundereggs: , , Geodes: , , , Awesome treasure Mel..Is the third one the one of the Geode kids from james?? hint hint..
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Post by melhill1659 on May 26, 2017 21:45:50 GMT -5
Thundereggs: , , Geodes: , , , Awesome treasure Mel..Is the third one the one of the Geode kids from james?? hint hint.. From Dave, yes and first one Baker Egg from Dave. I found the white Geode and black one is from a museum gift shop in Houston.
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Post by coloradocliff on May 26, 2017 22:48:26 GMT -5
Awesome treasure Mel..Is the third one the one of the Geode kids from james?? hint hint.. From Dave, yes and first one Baker Egg from Dave. I found the white Geode and black one is from a museum gift shop in Houston. You're too young to have that much treasure..Send it to me.. Grin Such beautiful pieces, such beautiful friends.. I Feel blessed to be a part of all this Makes me want to set up the saw and cut a few.. grin
Cliff
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Post by 1dave on May 27, 2017 2:21:06 GMT -5
Maybe??? Do they appear light in weight for size? That could indicate hollow interior, which would make them thundereggs. Even if not light, they might be. Only way to tell for sure is to saw them in half. Agree the orange one is probably not. I thought hollow inside made them geodes? I have a lot to learn! I can't cut them but I did bust a few open and it appears to be either agate or jasper inside. The lighter color ones have been crystallized inside. A little tangled terminology here. There are actually 4 kinds of nodules that have been indiscriminately labeled geodes. I don't understand 2 at all. The inside is a geode inside a geode? Anyway, any round rock that has an internal cavity, filled or unfilled is a geode. Specific types are: 1. A Thunderegg is formed in highly siliceous magma's around 1,100 oC (rhyolite, obsidian, pitchstone, ash flow tuff) by repeated needle spheres of crystobalite forming, being coated with feldspar, another layer of radiating needles, layer upon thousands of layers, then finally contracting enough for the trapped high pressure water between the needles to slowly turn to steam and force an internal void within the sphere. They are often found surrounded by small spheroids that were not ruptured. 2. Gas bubbles formed in molten basalt or andesite. 3. Hollows in sedimentary rock left behind in landslides or by dissolved rocks. 4. Dead creatures buried in silt, then body cavities were inflated by decay generated gas (Keokuk geodes etc) All four are filled with agate, opal and crystals pretty much the same way, or left empty if above mineral bearing fluids. melhill1659 the "black one" is a Mexican Coconut. They have a lot of calcite in them. The other appears to be a Utah Dugway.
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Post by fernwood on May 27, 2017 4:09:32 GMT -5
Maybe??? Do they appear light in weight for size? That could indicate hollow interior, which would make them thundereggs. Even if not light, they might be. Only way to tell for sure is to saw them in half. Agree the orange one is probably not. I thought hollow inside made them geodes? I have a lot to learn! I can't cut them but I did bust a few open and it appears to be either agate or jasper inside. The lighter color ones have been crystallized inside. I have some thundereggs with a slightly hollow center/crystals. Was told that they were still thundereggs, due to the size of the center opening. This was many years ago at a gem society rock show, so my advice could be incorrect.
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Post by 1dave on May 27, 2017 9:02:28 GMT -5
They all fill in similar fashion depending on the temperature and mineral content of fluids. Cathedral Agate from Brazil Hot fluids deposit on all surfaces, cool fluids deposit in level planes on the floor. The filling usually takes many separate episodes and varies from hot to cold and back again.
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,681
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Post by Fossilman on May 27, 2017 9:08:54 GMT -5
"BOOM" Now those are some beautiful eggs............SCORE!
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