kellyj
starting to spend too much on rocks
Member since December 2013
Posts: 100 
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Post by kellyj on Feb 23, 2015 1:12:22 GMT -5
My friend found this rock a while back in central Minnesota off of a little used path, in some overgrown brush. He has cleaned it up quite a bit. Its also hollow inside...it takes a littlewhile for water to drain out. There is plenty of crystal formations and druzy ( I couldn't catch with my camera). I've been told that it is an agate to "it's a vug"  by some cabby old lady. I know you all are quite knowledgeable and I hope you can tell me what it is:
When the sun hits it it really sparkles a lot. Let me know if I should take some more pictures.
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alan
starting to spend too much on rocks
Member since December 2013
Posts: 111 
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Post by alan on Feb 23, 2015 9:54:07 GMT -5
If one person called this an agate and the other called it a vug... they both could be correct... If the stone is micro-crystalline SiO2 (chalcedony) along with visibly crystalline quartz, it could be an agate. Most would like to see banding before calling it an agate...
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Post by captbob on Feb 23, 2015 10:10:17 GMT -5
A rock may have a vug, or many vugs, but it can not BE a vug.
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alan
starting to spend too much on rocks
Member since December 2013
Posts: 111
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Post by alan on Feb 23, 2015 10:17:56 GMT -5
It can be the contents that filled a vug
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Fossilman
Cave Dweller 
Member since January 2009
Posts: 20,723
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Post by Fossilman on Feb 23, 2015 10:47:39 GMT -5
Nice chalcedony,you going to cut it? Cut cut cut cut!!! LOL
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Feb 23, 2015 11:05:43 GMT -5
It can be the contents that filled a vug agate can fill a vug. Montana agates are clearly agates (indeed agatized wood), yet fail to have banding. Agate is the clear form of chalcedony. Bands appreciated, but not required. Kelly, you may have some agate there. Whatcha gonna do wit it? |
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Post by deb193redux on Feb 23, 2015 12:07:07 GMT -5
I think the "its a vug" comment was about the number of holes and somewhat unattractive look.
it is likely worth a cut, but if it does not show something interesting, may not be worth any more fuss
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Post by snowmom on Feb 25, 2015 18:01:37 GMT -5
Kelly, to most people who collect Lakers, there is only one way of looking at it. everything else is "not an agate" even though there are probably a hundred or more different types that others call agates. When I was first trying to sort out the idea of an agate, I was told the same thing "not an agate" ( I live at Lake Huron ) I became very discouraged- then I ran across this little online book. It was very useful to help me sort out some of the things I was finding (I have found very few Lakers but lots of other agates since then) instead of reading "lake superior agates", substitute the term Great Lakes Agates in your mind. I have seen posts on another forum of some your agates as well as some posted here, you have a great collection! best wishes rockhoundstation1.com/pdfs-etc/June2009.pdf |
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Post by drocknut on Feb 26, 2015 0:20:20 GMT -5
It can be the contents that filled a vug agate can fill a vug. Montana agates are clearly agates (indeed agatized wood), yet fail to have banding. Agate is the clear form of chalcedony. Bands appreciated, but not required. Shotgunner I beg to differ but there are some Montana agates that do have banding. |
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Feb 26, 2015 2:34:45 GMT -5
agate can fill a vug. Montana agates are clearly agates (indeed agatized wood), yet fail to have banding. Agate is the clear form of chalcedony. Bands appreciated, but not required. Shotgunner I beg to differ but there are some Montana agates that do have banding. Oopsie |
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by some cabby old lady. I know you all are quite knowledgeable and I hope you can tell me what it is:
