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Post by 1dave on Jul 31, 2023 17:24:38 GMT -5
Last week I had another Great Grand daughter visit that wanted to see my rocks. Here is a photo she took. Years ago I cut groves into this 2 X 4 to hold my small slabs. Most are Brazilian. Also present are a chunk of copper, Iron pyrite, copper pyrite, and other slabs
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dillonf
fully equipped rock polisher
Hounding and tumbling
Member since February 2022
Posts: 1,622
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Post by dillonf on Jul 31, 2023 19:49:34 GMT -5
Nice!
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Post by rmf on Jul 31, 2023 20:02:24 GMT -5
I thought that was a rock concert on wood bleachers.
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Post by liveoak on Aug 1, 2023 6:23:46 GMT -5
I like the 2 X 4 idea Dave, good one. Going to have to get Tom to make me one of those !
Thanks for showing it, Patty
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Post by 1dave on Aug 1, 2023 14:08:02 GMT -5
My "Flying special." This bubble was swimming in fast flowing basalt. See how stretched out the bubble became? This is my favorite: See if you can determine what went on inside it. Perhaps the way it was cut is why there is so much material around the edges. But those tiny layer after layer is my interest. In some specimens they are tiny and close together. In other, they are not. Why? My New Theory: All SiO2 bearing rocks are held together by powerful Pi bonds. They are difficult to break with solvents. Most silica gel in nature is created in those rare moments when they are shattered by violent shockwaves - impacts, continental collisions, volcanic explosions, earthquakes, landslides - Then those shattered and freed silica bonds are grabbed by weak H bonds from groundwater to become tons of silica gel flowing in groundwater into the nearest voids, geodes, thundereggs, whatever. But those tiny quartz crystals floating in the voids are for a while still being assaulted by thousands of shockwaves per second! That turns them on, off, reverse, off, reverse . . . So my theory is that those tight bands are made in minutes, not centuries. How far are they from the shockwave source? How powerful were they? Are those bands DATA on that? These slabs are from Indonesia - the land of Krakatoa. How far apart were they?
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Post by liveoak on Aug 1, 2023 14:51:32 GMT -5
Dave, are those colorful slabs shown in natural white light ? If so, that's pretty amazing.
Patty
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Post by 1dave on Aug 1, 2023 15:02:12 GMT -5
Dave, are those colorful slabs shown in natural white light ? If so, that's pretty amazing. Patty The photos were made in Indonesia and I think they use special lighting. It seems to be a tight beamed lite, only the edges of the finger are lit.
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Post by liveoak on Aug 1, 2023 15:36:05 GMT -5
Still, really beautiful.
Patty
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Post by HankRocks on Aug 1, 2023 17:43:25 GMT -5
1dave It's interesting to me that agates formed as they did with silica rich solution. And the Quartz Crystals in Arkansas formed with a silica rich solution, but no agate associated with the crystals. Obviously two different environments, fracture and tilted sandstone and shale as opposed to volcanic masses. Wonder which was faster. Henry
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Post by jasoninsd on Aug 1, 2023 20:51:58 GMT -5
I thought that was a rock concert on wood bleachers. 1dave - That is such a simple, yet genius idea to use the routed out wood for a slab stand!! I like that a lot!!
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Post by 1dave on Aug 1, 2023 22:12:07 GMT -5
I thought that was a rock concert on wood bleachers. 1dave - That is such a simple, yet genius idea to use the routed out wood for a slab stand!! I like that a lot!! I used a table saw. Set the fence and make a shallow cut, move the fence and widen the cut, move the fence to make the next cut. a 2 X 6 or 8 may mave been better.
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wargrafix
Cave Dweller
Member since June 2023
Posts: 1,020
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Post by wargrafix on Aug 2, 2023 16:59:39 GMT -5
Dave is a Rockstar. Confirmed.
Those agates are brilliant! Pun intended
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