rockstock
spending too much on rocks
Member since April 2019
Posts: 472
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Post by rockstock on Jan 7, 2021 17:14:04 GMT -5
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Post by jasoninsd on Jan 7, 2021 18:06:00 GMT -5
I'm far from an expert on any rocks, let alone Lake Superior Agates...but I have never seen any like those. That is so amazing! I can't wait to hear from others what they think about it or if anyone else has pics showing any agate like yours! Stunning!!!
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Brian
fully equipped rock polisher
Member since July 2020
Posts: 1,506
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Post by Brian on Jan 9, 2021 9:22:26 GMT -5
I’m not much help either, but I just wanted to say that looks amazing! I’d be thrilled to crack open an egg that looks like that third picture!
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NDK
Cave Dweller
Member since January 2009
Posts: 9,439
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Post by NDK on Jan 9, 2021 9:49:35 GMT -5
Fantastic lakers! I can't help either but I'm wondering if Ali or Billy may be able to... MsAli toiv0
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Post by rmf on Jan 9, 2021 10:05:02 GMT -5
I have a moss agate Lake Superior I purchased when I stopped at Kingsley North some years ago(it was cheaper but I had not seen it before), I have seen Lake Superiors with Copper in them in a museum at Houghton, MI these are rare. Other subdivisions of Lake Superior Agates I do not know.
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rockstock
spending too much on rocks
Member since April 2019
Posts: 472
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Post by rockstock on Jan 9, 2021 11:39:30 GMT -5
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kyoti
has rocks in the head
Member since June 2020
Posts: 542
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Post by kyoti on Jan 11, 2021 8:10:38 GMT -5
Sorry I can't help with the ID but those are some really cool Lakers! I love the one with the big dendrites / rutiles.
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Post by stephan on Jan 11, 2021 17:15:48 GMT -5
Not sure how common various types are (other than native copper-bearing ones being rare), as I'm a long way from Lake Superior, and the few Lakers I own were purchaed. I do have one rainflower agate from China with with agate-quartz-agate pattern like this. IMG_6032_Another Rainflower agate (front) by Stephan T., on Flickr According to posts by 1dave , this would occur as the silica-bearing waters change in temperature, pressure and/or silica content over time.
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rockstock
spending too much on rocks
Member since April 2019
Posts: 472
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Post by rockstock on Jan 11, 2021 17:25:56 GMT -5
Thank you for having a similar stone! It was bothering me that I couldn't seem to find another. Poor inventory or searching at home and poor googling. Awesome agate you have there.
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Post by jasoninsd on Jan 11, 2021 17:42:49 GMT -5
I had to add something about Lake Superior Agates...
They are not native to South Dakota at all. However, Fairburn Agates are native. There are a ton of weekend hounders looking for Fairburn Agates. There are two "main" places people look for Fairburn Agates...down by the town of Fairburn and at Railroad Buttes.
Someone had an amazing sense of humor...in my opinion. They took a bunch of Lake Superior Agates and dispersed them randomly all over Railroad Buttes where they could easily be found. So, every once in awhile someone will post a picture on the Fairburn Agate Facebook page (my wife is on it) asking if what they found is a Fairburn...to which they get told it's a Lake Superior Agate and the confusion ensues.
I think it's hilarious...
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Post by 1dave on Jan 11, 2021 17:46:34 GMT -5
A nice clear cut demonstration of "fortification" fill pattern. Crystalizing from walls to the center, starting with chalcedony needle fibers pointing toward the center, slowly changing to twisty moganite fibers because of iron messing up the crystal structure and imparting yellow tinge. As the SiO2 concentration falls, pure quartz crystals grow. Is the center filled with calcite?
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Post by stephan on Jan 11, 2021 18:19:56 GMT -5
I had to add something about Lake Superior Agates... They are not native to South Dakota at all. However, Fairburn Agates are native. There are a ton of weekend hounders looking for Fairburn Agates. There are two "main" places people look for Fairburn Agates...down by the town of Fairburn and at Railroad Buttes. Someone had an amazing sense of humor...in my opinion. They took a bunch of Lake Superior Agates and dispersed them randomly all over Railroad Buttes where they could easily be found. So, every once in awhile someone will post a picture on the Fairburn Agate Facebook page (my wife is on it) asking if what they found is a Fairburn...to which they get told it's a Lake Superior Agate and the confusion ensues. I think it's hilarious... It needed to be done, because identifying rocks is too easy.
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Joseph Hoffman
off to a rocking start
Member since November 2020
Posts: 20
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Post by Joseph Hoffman on Jan 11, 2021 19:48:38 GMT -5
That first one is incredible. I'd love to find one like that.
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