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achondrite fragment?

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#1 unfindable

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Posted 29 September 2024 - 09:48 AM

I have found an unusual stone fragment which broke further when i cleaned it. The fragment on the photo shows clearly an outer rim of light colored material and the interiour is complex. The first photo is of the interiour and the second photo is of the outer crust. Could it be an achondrite?

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Edited by unfindable, 29 September 2024 - 03:24 PM.


#2 Justin Fuller

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Posted 29 September 2024 - 10:36 AM

Looks like granite to me, but the crust is interesting, could be a deposit made onto the rock when that part was exposed. Either way this stone has an interesting story.
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#3 unfindable

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Posted 29 September 2024 - 11:13 AM

Looks like granite to me, but the crust is interesting, could be a deposit made onto the rock when that part was exposed. Either way this stone has an interesting story.

Here are photo's of all the fragments and they all got the same white crust. friable stone.

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#4 unfindable

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Posted 29 September 2024 - 11:18 AM

here some closeups 

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#5 Justin Fuller

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Posted 29 September 2024 - 03:20 PM

The layer makes me think perhaps this stone was in an underground cavity filled with water, where the layer was deposited/crystalized on top the original granite. This, from my couple of undergrad geology courses and general amateur geologist knowledge.

#6 unfindable

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Posted 30 September 2024 - 02:36 AM

The layer makes me think perhaps this stone was in an underground cavity filled with water, where the layer was deposited/crystalized on top the original granite. This, from my couple of undergrad geology courses and general amateur geologist knowledge.

The outer layer has the same makeup as the inside, and it has a thin almost glassy brown layer underneath the outer lighter layer. It must have iron rich minerals judging by the amount of rust throughout the stone. But there is a color difference between the brown line underneath the outer crust and the oxidation areas throughout the stone. And what do you think of the crystal in the right lower corner photo 2

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Edited by unfindable, 30 September 2024 - 03:15 AM.


#7 leonardovaller

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Posted 01 October 2024 - 04:10 AM

This is an achondrite, specifically eucrite. Do you notice how thin the fusion crust is? It has the same thickness as the grooves of my fingerprints.

 

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#8 lee14

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Posted 01 October 2024 - 05:57 AM

This is an achondrite, specifically eucrite. Do you notice how thin the fusion crust is? It has the same thickness as the grooves of my fingerprints.

Of course. Actual fusion crusts are dark. The white layer on the OP images is a concretion. 

 

Lee


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#9 unfindable

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Posted 01 October 2024 - 01:57 PM

This is an achondrite, specifically eucrite. Do you notice how thin the fusion crust is? It has the same thickness as the grooves of my fingerprints.

i never mentioned fusion crust,  but some times they can be thicker too. but there is an piece of crust on my rock that has a brown black less than a mm thick layer  on top of the white layer. So my rock which is a weathered example had  at one point a black outer layer with a white thiker layer underneath and then a thin glassy brown layer and then the wite interiour. Here is a cut slice of the rock. note the out of place gray black incusion.

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Edited by unfindable, 01 October 2024 - 02:03 PM.


#10 unfindable

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Posted 01 October 2024 - 02:08 PM

Of course. Actual fusion crusts are dark. The white layer on the OP images is a concretion. 

 

Lee

the outer white layer has the  same composition as the inside. could it still be a concretion layer??



#11 leonardovaller

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Posted 01 October 2024 - 03:13 PM

This is a glassy fussion crust.

Very same specimen (Camel Donga)

What's your experience that leads you to believe you can recognize a fusion crust?

Do you know the difference between a meteorwrong collector and a meteorite collector? The common sense and humility to acknowledge they lack experience.

The lack of common sense in you isn't reflected in picking up ordinary rocks from the ground. That's due to lack of knowledge, and it's normal. The lack of common sense is in continuing to insist that your rocks are meteorites when people with years of experience tell you they aren't.

 

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#12 unfindable

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Posted 01 October 2024 - 03:50 PM

This is a glassy fussion crust.

Very same specimen (Camel Donga)

What's your experience that leads you to believe you can recognize a fusion crust?

Do you know the difference between a meteorwrong collector and a meteorite collector? The common sense and humility to acknowledge they lack experience.

The lack of common sense in you isn't reflected in picking up ordinary rocks from the ground. That's due to lack of knowledge, and it's normal. The lack of common sense is in continuing to insist that your rocks are meteorites when people with years of experience tell you they aren't.

 

attachicon.gif 455783134_10229710006607432_4541890867477918650_n.jpg

well do you feel better now that you got that of your chest. meteorites are not black and white but very complex with unusual ones that an expert like you would never call a meteorite. just an example the Erg chech 002 but many more recent finds who are so weird the no one would say they are meteorite. and yes i know what fusioncrust is i don't study the and track every find and look at topher spin for nothing. Only hard sience can prove in a lab what it is. and obvisiouly not by looking at photo's. i wil now quit this forum because it leads nowhere. and i wil not be reading the posts  any more.


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#13 leonardovaller

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Posted 01 October 2024 - 06:35 PM

well do you feel better now that you got that of your chest. meteorites are not black and white but very complex with unusual ones that an expert like you would never call a meteorite. just an example the Erg chech 002 but many more recent finds who are so weird the no one would say they are meteorite. and yes i know what fusioncrust is i don't study the and track every find and look at topher spin for nothing. Only hard sience can prove in a lab what it is. and obvisiouly not by looking at photo's. i wil now quit this forum because it leads nowhere. and i wil not be reading the posts  any more.

Erg Chech 002 is one of the most beautiful and desired meteorites in the world. It’s very famous but also expensive. I hope to someday add even just a single gram to my collection. And of course, when I do, it will be by purchasing it from a reputable meteorite dealer. That’s how I’ve accumulated my collection. I’m by no means an expert, I acknowledge that and I act accordingly. My strategy is to consult with experts and take their advice very seriously.

 

Two years ago, I was actually scammed when I bought a piece of basalt that I mistakenly attributed with meteorite characteristics, trusting an experience I didn’t have at the time. My inquiry is somewhere on the forum, and you’ll see that, for example, Lee suggested I should be cautious with items coming from China. I overestimated my abilities, and as I said, the result was that I was scammed. I won’t say it happens to everyone. Some people avoid it. People that have been scammed at one point, have one thing in common, and I just mentioned it: We overestimate our knowledge.

IMG_20241001_172352.jpg


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#14 bigdob24

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Posted 01 October 2024 - 08:00 PM

 “i wil now quit this forum because it leads nowhere. and i wil not be reading the posts  any more”

I believe we have heard this before!

I really feel sorry for this guy, I truly wish he would pick up an actual meteorite to show but when you ask on a site with knowledgeable people you have be humble enough to accept the hard truth and learn from it

I admire his determination 



#15 lee14

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Posted 02 October 2024 - 08:32 AM

 

 

And How many times has he said he would stop with the BS rock posts

In The Space Rock Forum

only to return a few days later with another

potential moon/mars/

"pseudo meteorite"

"for a buyer" 

 

 

 

 

 

 

WHAT IS WRONG WITH THIS FORUM

IS NOT THE FAULT OF THIS SELF PROCLAIMED

"METEORITE DEALER/VENDOR" IN THE CITY OF ******** IN EUROPE

 

 

 

 

 

 

 

.

There is nothing wrong with the forum. It functions as a platform for inquiry and education. The moderators correctly favor a laissez-faire model, only intervening when the content is in blatant violation of the ostensible subject matter, or the conversation turns argumentative or abusive.

 

The issue here is behavioral, in the psychological sense. The apparent intent of the OP is merely to seek attention. In the OP's favor, when confronted with factual analysis of his specimens, he generally admits to the terrestrial origin. His very name would seem to indicate the recognition of the unlikelihood of the chance discovery of a genuine meteorite. Nevertheless, the posts persist.

 

If the participants here find these posts objectionable, for whatever reason, stop reinforcing the attention-seeking behavior. How? By negative reinforcement. Negative reinforcement is not punishment, as is commonly but erroneously understood, it is the withdrawal of positive reinforcement, i.e., supplying attention by attempting to engage in a factual exchange.

 

This argument may seem to be on the fringes of the subject matter of the forum, being a psychological assessment rather than addressing mineralogy or meteoritics, but having been in the capacity of buyer, seller, or collector for a quarter of a century, I can tell the reader that there is a perceived subjective benefit to finding or possessing genuine meteorites. They're unusual, often valuable, and come from a place none of us is ever likely to visit. Often though, when confronted with contradictory evidence indicating that their prized specimen is indeed nothing but a terrestrial rock, the response devolves into an emotional attachment. It's a recognized syndrome, eventually seen by most well known buyers and sellers.

 

Lee


Edited by lee14, 02 October 2024 - 10:01 AM.

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